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<div class="title">soundgen.cpp</div>  </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/*</span></div><div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment">  Created by Fabrizio Di Vittorio (fdivitto2013@gmail.com) - &lt;http://www.fabgl.com&gt;</span></div><div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment">  Copyright (c) 2019-2021 Fabrizio Di Vittorio.</span></div><div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment">  All rights reserved.</span></div><div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment">* Please contact fdivitto2013@gmail.com if you need a commercial license.</span></div><div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment">* This library and related software is available under GPL v3.</span></div><div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment">  FabGL is free software: you can redistribute it and/or modify</span></div><div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment">  it under the terms of the GNU General Public License as published by</span></div><div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment">  the Free Software Foundation, either version 3 of the License, or</span></div><div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment">  (at your option) any later version.</span></div><div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="comment">  FabGL is distributed in the hope that it will be useful,</span></div><div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="comment">  but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div><div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="comment">  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span></div><div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="comment">  GNU General Public License for more details.</span></div><div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="comment">  You should have received a copy of the GNU General Public License</span></div><div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="comment">  along with FabGL.  If not, see &lt;http://www.gnu.org/licenses/&gt;.</span></div><div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;</div><div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;</div><div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;</div><div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;</div><div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="preprocessor">#include &quot;freertos/FreeRTOS.h&quot;</span></div><div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="preprocessor">#include &quot;freertos/timers.h&quot;</span></div><div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;</div><div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="preprocessor">#include &lt;string.h&gt;</span></div><div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="preprocessor">#include &lt;ctype.h&gt;</span></div><div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="preprocessor">#include &lt;math.h&gt;</span></div><div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;</div><div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="preprocessor">#include &quot;driver/i2s.h&quot;</span></div><div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="preprocessor">#include &quot;driver/adc.h&quot;</span></div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;<span class="preprocessor">#include &quot;esp_adc_cal.h&quot;</span></div><div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="preprocessor">#if __has_include(&quot;hal/i2s_types.h&quot;)</span></div><div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;<span class="preprocessor">  #include &quot;hal/i2s_types.h&quot;</span></div><div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;<span class="preprocessor">#include &quot;esp_log.h&quot;</span></div><div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;</div><div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;</div><div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="soundgen_8h.html">soundgen.h</a>&quot;</span></div><div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;</div><div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;</div><div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;<span class="preprocessor">#pragma GCC optimize (&quot;O2&quot;)</span></div><div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;</div><div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;</div><div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespacefabgl.html">fabgl</a> {</div><div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;</div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;</div><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;<span class="comment">// maximum value is I2S_SAMPLE_BUFFER_SIZE</span></div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;<span class="preprocessor">#define FABGL_SAMPLE_BUFFER_SIZE 32</span></div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;</div><div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;</div><div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;</div><div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;<span class="comment">// SineWaveformGenerator</span></div><div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;</div><div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;</div><div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;<span class="keyword">static</span> <span class="keyword">const</span> int8_t sinTable[257] = {</div><div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;   0,    3,    6,    9,   12,   16,   19,   22,   25,   28,   31,   34,   37,   40,   43,   46,</div><div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;  49,   51,   54,   57,   60,   63,   65,   68,   71,   73,   76,   78,   81,   83,   85,   88,</div><div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;  90,   92,   94,   96,   98,  100,  102,  104,  106,  107,  109,  111,  112,  113,  115,  116,</div><div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160; 117,  118,  120,  121,  122,  122,  123,  124,  125,  125,  126,  126,  126,  127,  127,  127,</div><div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160; 127,  127,  127,  127,  126,  126,  126,  125,  125,  124,  123,  122,  122,  121,  120,  118,</div><div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160; 117,  116,  115,  113,  112,  111,  109,  107,  106,  104,  102,  100,   98,   96,   94,   92,</div><div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;  90,   88,   85,   83,   81,   78,   76,   73,   71,   68,   65,   63,   60,   57,   54,   51,</div><div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;  49,   46,   43,   40,   37,   34,   31,   28,   25,   22,   19,   16,   12,    9,    6,    3,</div><div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;   0,   -3,   -6,   -9,  -12,  -16,  -19,  -22,  -25,  -28,  -31,  -34,  -37,  -40,  -43,  -46,</div><div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160; -49,  -51,  -54,  -57,  -60,  -63,  -65,  -68,  -71,  -73,  -76,  -78,  -81,  -83,  -85,  -88,</div><div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160; -90,  -92,  -94,  -96,  -98, -100, -102, -104, -106, -107, -109, -111, -112, -113, -115, -116,</div><div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;-117, -118, -120, -121, -122, -122, -123, -124, -125, -125, -126, -126, -126, -127, -127, -127,</div><div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;-127, -127, -127, -127, -126, -126, -126, -125, -125, -124, -123, -122, -122, -121, -120, -118,</div><div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;-117, -116, -115, -113, -112, -111, -109, -107, -106, -104, -102, -100,  -98,  -96,  -94,  -92,</div><div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160; -90,  -88,  -85,  -83,  -81,  -78,  -76,  -73,  -71,  -68,  -65,  -63,  -60,  -57,  -54,  -51,</div><div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160; -49,  -46,  -43,  -40,  -37,  -34,  -31,  -28,  -25,  -22,  -19,  -16,  -12,   -9,   -6,   -3,</div><div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;   0,</div><div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;};</div><div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;</div><div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;</div><div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;SineWaveformGenerator::SineWaveformGenerator()</div><div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160; : m_phaseInc(0),</div><div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;   m_phaseAcc(0),</div><div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;   m_frequency(0),</div><div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;   m_lastSample(0)</div><div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;{</div><div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;}</div><div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;</div><div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;</div><div class="line"><a name="l00093"></a><span class="lineno"><a class="line" href="classfabgl_1_1_sine_waveform_generator_a5b5c30c147988a4bef2b08394984079d.html#a5b5c30c147988a4bef2b08394984079d">   93</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classfabgl_1_1_sine_waveform_generator_a5b5c30c147988a4bef2b08394984079d.html#a5b5c30c147988a4bef2b08394984079d">SineWaveformGenerator::setFrequency</a>(<span class="keywordtype">int</span> value) {</div><div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;  <span class="keywordflow">if</span> (m_frequency != value) {</div><div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;    m_frequency = value;</div><div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;    m_phaseInc = (((uint32_t)m_frequency * 256) &lt;&lt; 11) / <a class="code" href="classfabgl_1_1_waveform_generator_abc395029362d9990b5dad44dfafe9d63.html#abc395029362d9990b5dad44dfafe9d63">sampleRate</a>();</div><div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;  }</div><div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;}</div><div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;</div><div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;</div><div class="line"><a name="l00101"></a><span class="lineno"><a class="line" href="classfabgl_1_1_sine_waveform_generator_a52c1060c5ab1219386569f2cc39991b9.html#a52c1060c5ab1219386569f2cc39991b9">  101</a></span>&#160;<span class="keywordtype">int</span> <a class="code" href="classfabgl_1_1_sine_waveform_generator_a52c1060c5ab1219386569f2cc39991b9.html#a52c1060c5ab1219386569f2cc39991b9">SineWaveformGenerator::getSample</a>() {</div><div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;  <span class="keywordflow">if</span> (m_frequency == 0 || <a class="code" href="classfabgl_1_1_waveform_generator_a996f2f6c960641738fc46d3f39f6ef6f.html#a996f2f6c960641738fc46d3f39f6ef6f">duration</a>() == 0) {</div><div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;    <span class="keywordflow">if</span> (m_lastSample &gt; 0)</div><div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;      --m_lastSample;</div><div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;    <span class="keywordflow">else</span> <span class="keywordflow">if</span> (m_lastSample &lt; 0)</div><div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;      ++m_lastSample;</div><div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;    <span class="keywordflow">else</span></div><div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;      m_phaseAcc = 0;</div><div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;    <span class="keywordflow">return</span> m_lastSample;</div><div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;  }</div><div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;</div><div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;  <span class="comment">// get sample  (-128...+127)</span></div><div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;  uint32_t index = m_phaseAcc &gt;&gt; 11;</div><div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;  <span class="keywordtype">double</span> fmul = (double)(m_phaseAcc &amp; 0x7ff) / 2048.0;</div><div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;  <span class="keywordtype">int</span> sample = sinTable[index] + (sinTable[index + 1] - sinTable[index]) * fmul;</div><div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;</div><div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;  <span class="comment">// process volume</span></div><div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;  sample = sample * <a class="code" href="classfabgl_1_1_waveform_generator_a56fd55a21e8060769938c33ac16ee4f2.html#a56fd55a21e8060769938c33ac16ee4f2">volume</a>() / 127;</div><div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;</div><div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;  m_lastSample = sample;</div><div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;</div><div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;  m_phaseAcc = (m_phaseAcc + m_phaseInc) &amp; 0x7ffff;</div><div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;</div><div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;  decDuration();</div><div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;</div><div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;  <span class="keywordflow">return</span> sample;</div><div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;}</div><div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;</div><div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;</div><div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;<span class="comment">// SineWaveformGenerator</span></div><div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;</div><div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;</div><div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;<span class="comment">// SquareWaveformGenerator</span></div><div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;</div><div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;</div><div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;SquareWaveformGenerator::SquareWaveformGenerator()</div><div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;  : m_phaseInc(0),</div><div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;    m_phaseAcc(0),</div><div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;    m_frequency(0),</div><div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;    m_lastSample(0),</div><div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;    m_dutyCycle(127)</div><div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;{</div><div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;}</div><div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;</div><div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;</div><div class="line"><a name="l00149"></a><span class="lineno"><a class="line" href="classfabgl_1_1_square_waveform_generator_a5b5c30c147988a4bef2b08394984079d.html#a5b5c30c147988a4bef2b08394984079d">  149</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classfabgl_1_1_square_waveform_generator_a5b5c30c147988a4bef2b08394984079d.html#a5b5c30c147988a4bef2b08394984079d">SquareWaveformGenerator::setFrequency</a>(<span class="keywordtype">int</span> value) {</div><div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;  <span class="keywordflow">if</span> (m_frequency != value) {</div><div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;    m_frequency = value;</div><div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;    m_phaseInc = (((uint32_t)m_frequency * 256) &lt;&lt; 11) / <a class="code" href="classfabgl_1_1_waveform_generator_abc395029362d9990b5dad44dfafe9d63.html#abc395029362d9990b5dad44dfafe9d63">sampleRate</a>();</div><div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;  }</div><div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;}</div><div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;</div><div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;</div><div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;<span class="comment">// dutyCycle: 0..255 (255=100%)</span></div><div class="line"><a name="l00158"></a><span class="lineno"><a class="line" href="classfabgl_1_1_square_waveform_generator_a5719e6bf55f3f485e6b82e7800acf004.html#a5719e6bf55f3f485e6b82e7800acf004">  158</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classfabgl_1_1_square_waveform_generator_a5719e6bf55f3f485e6b82e7800acf004.html#a5719e6bf55f3f485e6b82e7800acf004">SquareWaveformGenerator::setDutyCycle</a>(<span class="keywordtype">int</span> dutyCycle)</div><div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;{</div><div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;  m_dutyCycle = dutyCycle;</div><div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;}</div><div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;</div><div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;</div><div class="line"><a name="l00164"></a><span class="lineno"><a class="line" href="classfabgl_1_1_square_waveform_generator_a52c1060c5ab1219386569f2cc39991b9.html#a52c1060c5ab1219386569f2cc39991b9">  164</a></span>&#160;<span class="keywordtype">int</span> <a class="code" href="classfabgl_1_1_square_waveform_generator_a52c1060c5ab1219386569f2cc39991b9.html#a52c1060c5ab1219386569f2cc39991b9">SquareWaveformGenerator::getSample</a>() {</div><div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;  <span class="keywordflow">if</span> (m_frequency == 0 || <a class="code" href="classfabgl_1_1_waveform_generator_a996f2f6c960641738fc46d3f39f6ef6f.html#a996f2f6c960641738fc46d3f39f6ef6f">duration</a>() == 0) {</div><div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;    <span class="keywordflow">if</span> (m_lastSample &gt; 0)</div><div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;      --m_lastSample;</div><div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;    <span class="keywordflow">else</span> <span class="keywordflow">if</span> (m_lastSample &lt; 0)</div><div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;      ++m_lastSample;</div><div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;    <span class="keywordflow">else</span></div><div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;      m_phaseAcc = 0;</div><div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;    <span class="keywordflow">return</span> m_lastSample;</div><div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;  }</div><div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;</div><div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;  uint32_t index = m_phaseAcc &gt;&gt; 11;</div><div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;  <span class="keywordtype">int</span> sample = (index &lt;= m_dutyCycle ? 127 : -127);</div><div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;</div><div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;  <span class="comment">// process volume</span></div><div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;  sample = sample * <a class="code" href="classfabgl_1_1_waveform_generator_a56fd55a21e8060769938c33ac16ee4f2.html#a56fd55a21e8060769938c33ac16ee4f2">volume</a>() / 127;</div><div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;</div><div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;  m_lastSample = sample;</div><div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;</div><div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;  m_phaseAcc = (m_phaseAcc + m_phaseInc) &amp; 0x7ffff;</div><div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;</div><div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;  decDuration();</div><div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;</div><div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;  <span class="keywordflow">return</span> sample;</div><div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;}</div><div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;</div><div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;<span class="comment">// SquareWaveformGenerator</span></div><div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;</div><div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;<span class="comment">// TriangleWaveformGenerator</span></div><div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;</div><div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;</div><div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;TriangleWaveformGenerator::TriangleWaveformGenerator()</div><div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;  : m_phaseInc(0),</div><div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;    m_phaseAcc(0),</div><div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;    m_frequency(0),</div><div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;    m_lastSample(0)</div><div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160;{</div><div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;}</div><div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;</div><div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;</div><div class="line"><a name="l00207"></a><span class="lineno"><a class="line" href="classfabgl_1_1_triangle_waveform_generator_a5b5c30c147988a4bef2b08394984079d.html#a5b5c30c147988a4bef2b08394984079d">  207</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classfabgl_1_1_triangle_waveform_generator_a5b5c30c147988a4bef2b08394984079d.html#a5b5c30c147988a4bef2b08394984079d">TriangleWaveformGenerator::setFrequency</a>(<span class="keywordtype">int</span> value) {</div><div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;  <span class="keywordflow">if</span> (m_frequency != value) {</div><div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;    m_frequency = value;</div><div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;    m_phaseInc = (((uint32_t)m_frequency * 256) &lt;&lt; 11) / <a class="code" href="classfabgl_1_1_waveform_generator_abc395029362d9990b5dad44dfafe9d63.html#abc395029362d9990b5dad44dfafe9d63">sampleRate</a>();</div><div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;  }</div><div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;}</div><div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;</div><div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;</div><div class="line"><a name="l00215"></a><span class="lineno"><a class="line" href="classfabgl_1_1_triangle_waveform_generator_a52c1060c5ab1219386569f2cc39991b9.html#a52c1060c5ab1219386569f2cc39991b9">  215</a></span>&#160;<span class="keywordtype">int</span> <a class="code" href="classfabgl_1_1_triangle_waveform_generator_a52c1060c5ab1219386569f2cc39991b9.html#a52c1060c5ab1219386569f2cc39991b9">TriangleWaveformGenerator::getSample</a>() {</div><div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;  <span class="keywordflow">if</span> (m_frequency == 0 || <a class="code" href="classfabgl_1_1_waveform_generator_a996f2f6c960641738fc46d3f39f6ef6f.html#a996f2f6c960641738fc46d3f39f6ef6f">duration</a>() == 0) {</div><div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;    <span class="keywordflow">if</span> (m_lastSample &gt; 0)</div><div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;      --m_lastSample;</div><div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;    <span class="keywordflow">else</span> <span class="keywordflow">if</span> (m_lastSample &lt; 0)</div><div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;      ++m_lastSample;</div><div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;    <span class="keywordflow">else</span></div><div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;      m_phaseAcc = 0;</div><div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;    <span class="keywordflow">return</span> m_lastSample;</div><div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160;  }</div><div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;</div><div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;  uint32_t index = m_phaseAcc &gt;&gt; 11;</div><div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;  <span class="keywordtype">int</span> sample = (index &amp; 0x80 ? -1 : 1) * ((index &amp; 0x3F) * 2 - (index &amp; 0x40 ? 0 : 127));</div><div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;</div><div class="line"><a name="l00229"></a><span class="lineno">  229</span>&#160;  <span class="comment">// process volume</span></div><div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;  sample = sample * <a class="code" href="classfabgl_1_1_waveform_generator_a56fd55a21e8060769938c33ac16ee4f2.html#a56fd55a21e8060769938c33ac16ee4f2">volume</a>() / 127;</div><div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;</div><div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;  m_lastSample = sample;</div><div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;</div><div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;  m_phaseAcc = (m_phaseAcc + m_phaseInc) &amp; 0x7ffff;</div><div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;</div><div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;  decDuration();</div><div class="line"><a name="l00237"></a><span class="lineno">  237</span>&#160;</div><div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;  <span class="keywordflow">return</span> sample;</div><div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;}</div><div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;</div><div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;<span class="comment">// TriangleWaveformGenerator</span></div><div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160;</div><div class="line"><a name="l00245"></a><span class="lineno">  245</span>&#160;</div><div class="line"><a name="l00247"></a><span class="lineno">  247</span>&#160;<span class="comment">// SawtoothWaveformGenerator</span></div><div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;</div><div class="line"><a name="l00249"></a><span class="lineno">  249</span>&#160;</div><div class="line"><a name="l00250"></a><span class="lineno">  250</span>&#160;SawtoothWaveformGenerator::SawtoothWaveformGenerator()</div><div class="line"><a name="l00251"></a><span class="lineno">  251</span>&#160;  : m_phaseInc(0),</div><div class="line"><a name="l00252"></a><span class="lineno">  252</span>&#160;    m_phaseAcc(0),</div><div class="line"><a name="l00253"></a><span class="lineno">  253</span>&#160;    m_frequency(0),</div><div class="line"><a name="l00254"></a><span class="lineno">  254</span>&#160;    m_lastSample(0)</div><div class="line"><a name="l00255"></a><span class="lineno">  255</span>&#160;{</div><div class="line"><a name="l00256"></a><span class="lineno">  256</span>&#160;}</div><div class="line"><a name="l00257"></a><span class="lineno">  257</span>&#160;</div><div class="line"><a name="l00258"></a><span class="lineno">  258</span>&#160;</div><div class="line"><a name="l00259"></a><span class="lineno"><a class="line" href="classfabgl_1_1_sawtooth_waveform_generator_a5b5c30c147988a4bef2b08394984079d.html#a5b5c30c147988a4bef2b08394984079d">  259</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classfabgl_1_1_sawtooth_waveform_generator_a5b5c30c147988a4bef2b08394984079d.html#a5b5c30c147988a4bef2b08394984079d">SawtoothWaveformGenerator::setFrequency</a>(<span class="keywordtype">int</span> value) {</div><div class="line"><a name="l00260"></a><span class="lineno">  260</span>&#160;  <span class="keywordflow">if</span> (m_frequency != value) {</div><div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;    m_frequency = value;</div><div class="line"><a name="l00262"></a><span class="lineno">  262</span>&#160;    m_phaseInc = (((uint32_t)m_frequency * 256) &lt;&lt; 11) / <a class="code" href="classfabgl_1_1_waveform_generator_abc395029362d9990b5dad44dfafe9d63.html#abc395029362d9990b5dad44dfafe9d63">sampleRate</a>();</div><div class="line"><a name="l00263"></a><span class="lineno">  263</span>&#160;  }</div><div class="line"><a name="l00264"></a><span class="lineno">  264</span>&#160;}</div><div class="line"><a name="l00265"></a><span class="lineno">  265</span>&#160;</div><div class="line"><a name="l00266"></a><span class="lineno">  266</span>&#160;</div><div class="line"><a name="l00267"></a><span class="lineno"><a class="line" href="classfabgl_1_1_sawtooth_waveform_generator_a52c1060c5ab1219386569f2cc39991b9.html#a52c1060c5ab1219386569f2cc39991b9">  267</a></span>&#160;<span class="keywordtype">int</span> <a class="code" href="classfabgl_1_1_sawtooth_waveform_generator_a52c1060c5ab1219386569f2cc39991b9.html#a52c1060c5ab1219386569f2cc39991b9">SawtoothWaveformGenerator::getSample</a>() {</div><div class="line"><a name="l00268"></a><span class="lineno">  268</span>&#160;  <span class="keywordflow">if</span> (m_frequency == 0 || <a class="code" href="classfabgl_1_1_waveform_generator_a996f2f6c960641738fc46d3f39f6ef6f.html#a996f2f6c960641738fc46d3f39f6ef6f">duration</a>() == 0) {</div><div class="line"><a name="l00269"></a><span class="lineno">  269</span>&#160;    <span class="keywordflow">if</span> (m_lastSample &gt; 0)</div><div class="line"><a name="l00270"></a><span class="lineno">  270</span>&#160;      --m_lastSample;</div><div class="line"><a name="l00271"></a><span class="lineno">  271</span>&#160;    <span class="keywordflow">else</span> <span class="keywordflow">if</span> (m_lastSample &lt; 0)</div><div class="line"><a name="l00272"></a><span class="lineno">  272</span>&#160;      ++m_lastSample;</div><div class="line"><a name="l00273"></a><span class="lineno">  273</span>&#160;    <span class="keywordflow">else</span></div><div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160;      m_phaseAcc = 0;</div><div class="line"><a name="l00275"></a><span class="lineno">  275</span>&#160;    <span class="keywordflow">return</span> m_lastSample;</div><div class="line"><a name="l00276"></a><span class="lineno">  276</span>&#160;  }</div><div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160;</div><div class="line"><a name="l00278"></a><span class="lineno">  278</span>&#160;  uint32_t index = m_phaseAcc &gt;&gt; 11;</div><div class="line"><a name="l00279"></a><span class="lineno">  279</span>&#160;  <span class="keywordtype">int</span> sample = index - 128;</div><div class="line"><a name="l00280"></a><span class="lineno">  280</span>&#160;</div><div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160;  <span class="comment">// process volume</span></div><div class="line"><a name="l00282"></a><span class="lineno">  282</span>&#160;  sample = sample * <a class="code" href="classfabgl_1_1_waveform_generator_a56fd55a21e8060769938c33ac16ee4f2.html#a56fd55a21e8060769938c33ac16ee4f2">volume</a>() / 127;</div><div class="line"><a name="l00283"></a><span class="lineno">  283</span>&#160;</div><div class="line"><a name="l00284"></a><span class="lineno">  284</span>&#160;  m_lastSample = sample;</div><div class="line"><a name="l00285"></a><span class="lineno">  285</span>&#160;</div><div class="line"><a name="l00286"></a><span class="lineno">  286</span>&#160;  m_phaseAcc = (m_phaseAcc + m_phaseInc) &amp; 0x7ffff;</div><div class="line"><a name="l00287"></a><span class="lineno">  287</span>&#160;</div><div class="line"><a name="l00288"></a><span class="lineno">  288</span>&#160;  decDuration();</div><div class="line"><a name="l00289"></a><span class="lineno">  289</span>&#160;</div><div class="line"><a name="l00290"></a><span class="lineno">  290</span>&#160;  <span class="keywordflow">return</span> sample;</div><div class="line"><a name="l00291"></a><span class="lineno">  291</span>&#160;}</div><div class="line"><a name="l00292"></a><span class="lineno">  292</span>&#160;</div><div class="line"><a name="l00293"></a><span class="lineno">  293</span>&#160;<span class="comment">// TriangleWaveformGenerator</span></div><div class="line"><a name="l00295"></a><span class="lineno">  295</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00296"></a><span class="lineno">  296</span>&#160;</div><div class="line"><a name="l00297"></a><span class="lineno">  297</span>&#160;</div><div class="line"><a name="l00299"></a><span class="lineno">  299</span>&#160;<span class="comment">// NoiseWaveformGenerator</span></div><div class="line"><a name="l00300"></a><span class="lineno">  300</span>&#160;</div><div class="line"><a name="l00301"></a><span class="lineno">  301</span>&#160;</div><div class="line"><a name="l00302"></a><span class="lineno">  302</span>&#160;NoiseWaveformGenerator::NoiseWaveformGenerator()</div><div class="line"><a name="l00303"></a><span class="lineno">  303</span>&#160;  : m_noise(0xFAB7)</div><div class="line"><a name="l00304"></a><span class="lineno">  304</span>&#160;{</div><div class="line"><a name="l00305"></a><span class="lineno">  305</span>&#160;}</div><div class="line"><a name="l00306"></a><span class="lineno">  306</span>&#160;</div><div class="line"><a name="l00307"></a><span class="lineno">  307</span>&#160;</div><div class="line"><a name="l00308"></a><span class="lineno"><a class="line" href="classfabgl_1_1_noise_waveform_generator_a5b5c30c147988a4bef2b08394984079d.html#a5b5c30c147988a4bef2b08394984079d">  308</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classfabgl_1_1_noise_waveform_generator_a5b5c30c147988a4bef2b08394984079d.html#a5b5c30c147988a4bef2b08394984079d">NoiseWaveformGenerator::setFrequency</a>(<span class="keywordtype">int</span> value)</div><div class="line"><a name="l00309"></a><span class="lineno">  309</span>&#160;{</div><div class="line"><a name="l00310"></a><span class="lineno">  310</span>&#160;}</div><div class="line"><a name="l00311"></a><span class="lineno">  311</span>&#160;</div><div class="line"><a name="l00312"></a><span class="lineno">  312</span>&#160;</div><div class="line"><a name="l00313"></a><span class="lineno"><a class="line" href="classfabgl_1_1_noise_waveform_generator_a52c1060c5ab1219386569f2cc39991b9.html#a52c1060c5ab1219386569f2cc39991b9">  313</a></span>&#160;<span class="keywordtype">int</span> <a class="code" href="classfabgl_1_1_noise_waveform_generator_a52c1060c5ab1219386569f2cc39991b9.html#a52c1060c5ab1219386569f2cc39991b9">NoiseWaveformGenerator::getSample</a>()</div><div class="line"><a name="l00314"></a><span class="lineno">  314</span>&#160;{</div><div class="line"><a name="l00315"></a><span class="lineno">  315</span>&#160;  <span class="keywordflow">if</span> (<a class="code" href="classfabgl_1_1_waveform_generator_a996f2f6c960641738fc46d3f39f6ef6f.html#a996f2f6c960641738fc46d3f39f6ef6f">duration</a>() == 0) {</div><div class="line"><a name="l00316"></a><span class="lineno">  316</span>&#160;    <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00317"></a><span class="lineno">  317</span>&#160;  }</div><div class="line"><a name="l00318"></a><span class="lineno">  318</span>&#160;</div><div class="line"><a name="l00319"></a><span class="lineno">  319</span>&#160;  <span class="comment">// noise generator based on Galois LFSR</span></div><div class="line"><a name="l00320"></a><span class="lineno">  320</span>&#160;  m_noise = (m_noise &gt;&gt; 1) ^ (-(m_noise &amp; 1) &amp; 0xB400u);</div><div class="line"><a name="l00321"></a><span class="lineno">  321</span>&#160;  <span class="keywordtype">int</span> sample = 127 - (m_noise &gt;&gt; 8);</div><div class="line"><a name="l00322"></a><span class="lineno">  322</span>&#160;</div><div class="line"><a name="l00323"></a><span class="lineno">  323</span>&#160;  <span class="comment">// process volume</span></div><div class="line"><a name="l00324"></a><span class="lineno">  324</span>&#160;  sample = sample * <a class="code" href="classfabgl_1_1_waveform_generator_a56fd55a21e8060769938c33ac16ee4f2.html#a56fd55a21e8060769938c33ac16ee4f2">volume</a>() / 127;</div><div class="line"><a name="l00325"></a><span class="lineno">  325</span>&#160;</div><div class="line"><a name="l00326"></a><span class="lineno">  326</span>&#160;  decDuration();</div><div class="line"><a name="l00327"></a><span class="lineno">  327</span>&#160;</div><div class="line"><a name="l00328"></a><span class="lineno">  328</span>&#160;  <span class="keywordflow">return</span> sample;</div><div class="line"><a name="l00329"></a><span class="lineno">  329</span>&#160;}</div><div class="line"><a name="l00330"></a><span class="lineno">  330</span>&#160;</div><div class="line"><a name="l00331"></a><span class="lineno">  331</span>&#160;</div><div class="line"><a name="l00332"></a><span class="lineno">  332</span>&#160;<span class="comment">// NoiseWaveformGenerator</span></div><div class="line"><a name="l00334"></a><span class="lineno">  334</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00335"></a><span class="lineno">  335</span>&#160;</div><div class="line"><a name="l00336"></a><span class="lineno">  336</span>&#160;</div><div class="line"><a name="l00338"></a><span class="lineno">  338</span>&#160;<span class="comment">// VICNoiseGenerator</span></div><div class="line"><a name="l00339"></a><span class="lineno">  339</span>&#160;<span class="comment">// &quot;tries&quot; to emulate VIC6561 noise generator</span></div><div class="line"><a name="l00340"></a><span class="lineno">  340</span>&#160;<span class="comment">// derived from a reverse engineering VHDL code: http://sleepingelephant.com/ipw-web/bulletin/bb/viewtopic.php?f=11&amp;t=8733&amp;fbclid=IwAR16x6OMMb670bA2ZtYcbB0Zat_X-oHNB0NxxYigPffXa8G_InSIoNAEiPU</span></div><div class="line"><a name="l00341"></a><span class="lineno">  341</span>&#160;</div><div class="line"><a name="l00342"></a><span class="lineno">  342</span>&#160;</div><div class="line"><a name="l00343"></a><span class="lineno">  343</span>&#160;VICNoiseGenerator::VICNoiseGenerator()</div><div class="line"><a name="l00344"></a><span class="lineno">  344</span>&#160;  : m_frequency(0),</div><div class="line"><a name="l00345"></a><span class="lineno">  345</span>&#160;    m_counter(0),</div><div class="line"><a name="l00346"></a><span class="lineno">  346</span>&#160;    m_LFSR(LFSRINIT),</div><div class="line"><a name="l00347"></a><span class="lineno">  347</span>&#160;    m_outSR(0)</div><div class="line"><a name="l00348"></a><span class="lineno">  348</span>&#160;{</div><div class="line"><a name="l00349"></a><span class="lineno">  349</span>&#160;}</div><div class="line"><a name="l00350"></a><span class="lineno">  350</span>&#160;</div><div class="line"><a name="l00351"></a><span class="lineno">  351</span>&#160;</div><div class="line"><a name="l00352"></a><span class="lineno"><a class="line" href="classfabgl_1_1_v_i_c_noise_generator_a5b5c30c147988a4bef2b08394984079d.html#a5b5c30c147988a4bef2b08394984079d">  352</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classfabgl_1_1_v_i_c_noise_generator_a5b5c30c147988a4bef2b08394984079d.html#a5b5c30c147988a4bef2b08394984079d">VICNoiseGenerator::setFrequency</a>(<span class="keywordtype">int</span> value)</div><div class="line"><a name="l00353"></a><span class="lineno">  353</span>&#160;{</div><div class="line"><a name="l00354"></a><span class="lineno">  354</span>&#160;  <span class="keywordflow">if</span> (m_frequency != value) {</div><div class="line"><a name="l00355"></a><span class="lineno">  355</span>&#160;    m_frequency = value &gt;= 127 ? 0 : value;</div><div class="line"><a name="l00356"></a><span class="lineno">  356</span>&#160;    m_LFSR      = LFSRINIT;</div><div class="line"><a name="l00357"></a><span class="lineno">  357</span>&#160;    m_counter   = 0;</div><div class="line"><a name="l00358"></a><span class="lineno">  358</span>&#160;    m_outSR     = 0;</div><div class="line"><a name="l00359"></a><span class="lineno">  359</span>&#160;  }</div><div class="line"><a name="l00360"></a><span class="lineno">  360</span>&#160;}</div><div class="line"><a name="l00361"></a><span class="lineno">  361</span>&#160;</div><div class="line"><a name="l00362"></a><span class="lineno">  362</span>&#160;</div><div class="line"><a name="l00363"></a><span class="lineno"><a class="line" href="classfabgl_1_1_v_i_c_noise_generator_a52c1060c5ab1219386569f2cc39991b9.html#a52c1060c5ab1219386569f2cc39991b9">  363</a></span>&#160;<span class="keywordtype">int</span> <a class="code" href="classfabgl_1_1_v_i_c_noise_generator_a52c1060c5ab1219386569f2cc39991b9.html#a52c1060c5ab1219386569f2cc39991b9">VICNoiseGenerator::getSample</a>()</div><div class="line"><a name="l00364"></a><span class="lineno">  364</span>&#160;{</div><div class="line"><a name="l00365"></a><span class="lineno">  365</span>&#160;  <span class="keywordflow">if</span> (<a class="code" href="classfabgl_1_1_waveform_generator_a996f2f6c960641738fc46d3f39f6ef6f.html#a996f2f6c960641738fc46d3f39f6ef6f">duration</a>() == 0) {</div><div class="line"><a name="l00366"></a><span class="lineno">  366</span>&#160;    <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00367"></a><span class="lineno">  367</span>&#160;  }</div><div class="line"><a name="l00368"></a><span class="lineno">  368</span>&#160;</div><div class="line"><a name="l00369"></a><span class="lineno">  369</span>&#160;  <span class="keyword">const</span> <span class="keywordtype">int</span> reduc = CLK / 8 / <a class="code" href="classfabgl_1_1_waveform_generator_abc395029362d9990b5dad44dfafe9d63.html#abc395029362d9990b5dad44dfafe9d63">sampleRate</a>(); <span class="comment">// resample to sampleRate() (ie 16000Hz)</span></div><div class="line"><a name="l00370"></a><span class="lineno">  370</span>&#160;</div><div class="line"><a name="l00371"></a><span class="lineno">  371</span>&#160;  <span class="keywordtype">int</span> sample = 0;</div><div class="line"><a name="l00372"></a><span class="lineno">  372</span>&#160;</div><div class="line"><a name="l00373"></a><span class="lineno">  373</span>&#160;  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; reduc; ++i) {</div><div class="line"><a name="l00374"></a><span class="lineno">  374</span>&#160;</div><div class="line"><a name="l00375"></a><span class="lineno">  375</span>&#160;    <span class="keywordflow">if</span> (m_counter &gt;= 127) {</div><div class="line"><a name="l00376"></a><span class="lineno">  376</span>&#160;</div><div class="line"><a name="l00377"></a><span class="lineno">  377</span>&#160;      <span class="comment">// reset counter</span></div><div class="line"><a name="l00378"></a><span class="lineno">  378</span>&#160;      m_counter = m_frequency;</div><div class="line"><a name="l00379"></a><span class="lineno">  379</span>&#160;</div><div class="line"><a name="l00380"></a><span class="lineno">  380</span>&#160;      <span class="keywordflow">if</span> (m_LFSR &amp; 1)</div><div class="line"><a name="l00381"></a><span class="lineno">  381</span>&#160;        m_outSR = ((m_outSR &lt;&lt; 1) | ~(m_outSR &gt;&gt; 7));</div><div class="line"><a name="l00382"></a><span class="lineno">  382</span>&#160;</div><div class="line"><a name="l00383"></a><span class="lineno">  383</span>&#160;      m_LFSR &lt;&lt;= 1;</div><div class="line"><a name="l00384"></a><span class="lineno">  384</span>&#160;      <span class="keywordtype">int</span> bit3  = (m_LFSR &gt;&gt; 3) &amp; 1;</div><div class="line"><a name="l00385"></a><span class="lineno">  385</span>&#160;      <span class="keywordtype">int</span> bit12 = (m_LFSR &gt;&gt; 12) &amp; 1;</div><div class="line"><a name="l00386"></a><span class="lineno">  386</span>&#160;      <span class="keywordtype">int</span> bit14 = (m_LFSR &gt;&gt; 14) &amp; 1;</div><div class="line"><a name="l00387"></a><span class="lineno">  387</span>&#160;      <span class="keywordtype">int</span> bit15 = (m_LFSR &gt;&gt; 15) &amp; 1;</div><div class="line"><a name="l00388"></a><span class="lineno">  388</span>&#160;      m_LFSR |= (bit3 ^ bit12) ^ (bit14 ^ bit15);</div><div class="line"><a name="l00389"></a><span class="lineno">  389</span>&#160;    } <span class="keywordflow">else</span></div><div class="line"><a name="l00390"></a><span class="lineno">  390</span>&#160;      ++m_counter;</div><div class="line"><a name="l00391"></a><span class="lineno">  391</span>&#160;</div><div class="line"><a name="l00392"></a><span class="lineno">  392</span>&#160;    sample += m_outSR &amp; 1 ? 127 : -128;</div><div class="line"><a name="l00393"></a><span class="lineno">  393</span>&#160;  }</div><div class="line"><a name="l00394"></a><span class="lineno">  394</span>&#160;</div><div class="line"><a name="l00395"></a><span class="lineno">  395</span>&#160;  <span class="comment">// simple mean of all samples</span></div><div class="line"><a name="l00396"></a><span class="lineno">  396</span>&#160;</div><div class="line"><a name="l00397"></a><span class="lineno">  397</span>&#160;  sample = sample / reduc;</div><div class="line"><a name="l00398"></a><span class="lineno">  398</span>&#160;</div><div class="line"><a name="l00399"></a><span class="lineno">  399</span>&#160;  <span class="comment">// process volume</span></div><div class="line"><a name="l00400"></a><span class="lineno">  400</span>&#160;  sample = sample * <a class="code" href="classfabgl_1_1_waveform_generator_a56fd55a21e8060769938c33ac16ee4f2.html#a56fd55a21e8060769938c33ac16ee4f2">volume</a>() / 127;</div><div class="line"><a name="l00401"></a><span class="lineno">  401</span>&#160;</div><div class="line"><a name="l00402"></a><span class="lineno">  402</span>&#160;  decDuration();</div><div class="line"><a name="l00403"></a><span class="lineno">  403</span>&#160;</div><div class="line"><a name="l00404"></a><span class="lineno">  404</span>&#160;  <span class="keywordflow">return</span> sample;</div><div class="line"><a name="l00405"></a><span class="lineno">  405</span>&#160;}</div><div class="line"><a name="l00406"></a><span class="lineno">  406</span>&#160;</div><div class="line"><a name="l00407"></a><span class="lineno">  407</span>&#160;</div><div class="line"><a name="l00408"></a><span class="lineno">  408</span>&#160;<span class="comment">// VICNoiseGenerator</span></div><div class="line"><a name="l00410"></a><span class="lineno">  410</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00411"></a><span class="lineno">  411</span>&#160;</div><div class="line"><a name="l00412"></a><span class="lineno">  412</span>&#160;</div><div class="line"><a name="l00414"></a><span class="lineno">  414</span>&#160;<span class="comment">// SamplesGenerator</span></div><div class="line"><a name="l00415"></a><span class="lineno">  415</span>&#160;</div><div class="line"><a name="l00416"></a><span class="lineno">  416</span>&#160;</div><div class="line"><a name="l00417"></a><span class="lineno">  417</span>&#160;SamplesGenerator::SamplesGenerator(int8_t <span class="keyword">const</span> * <a class="code" href="displaycontroller_8h_a96db82e580e46e24e2b39dd6c5bf7c21.html#a96db82e580e46e24e2b39dd6c5bf7c21">data</a>, <span class="keywordtype">int</span> length)</div><div class="line"><a name="l00418"></a><span class="lineno">  418</span>&#160;  : m_data(<a class="code" href="displaycontroller_8h_a96db82e580e46e24e2b39dd6c5bf7c21.html#a96db82e580e46e24e2b39dd6c5bf7c21">data</a>),</div><div class="line"><a name="l00419"></a><span class="lineno">  419</span>&#160;    m_length(length),</div><div class="line"><a name="l00420"></a><span class="lineno">  420</span>&#160;    m_index(0)</div><div class="line"><a name="l00421"></a><span class="lineno">  421</span>&#160;{</div><div class="line"><a name="l00422"></a><span class="lineno">  422</span>&#160;}</div><div class="line"><a name="l00423"></a><span class="lineno">  423</span>&#160;</div><div class="line"><a name="l00424"></a><span class="lineno">  424</span>&#160;</div><div class="line"><a name="l00425"></a><span class="lineno"><a class="line" href="classfabgl_1_1_samples_generator_a5b5c30c147988a4bef2b08394984079d.html#a5b5c30c147988a4bef2b08394984079d">  425</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classfabgl_1_1_samples_generator_a5b5c30c147988a4bef2b08394984079d.html#a5b5c30c147988a4bef2b08394984079d">SamplesGenerator::setFrequency</a>(<span class="keywordtype">int</span> value)</div><div class="line"><a name="l00426"></a><span class="lineno">  426</span>&#160;{</div><div class="line"><a name="l00427"></a><span class="lineno">  427</span>&#160;}</div><div class="line"><a name="l00428"></a><span class="lineno">  428</span>&#160;</div><div class="line"><a name="l00429"></a><span class="lineno">  429</span>&#160;</div><div class="line"><a name="l00430"></a><span class="lineno"><a class="line" href="classfabgl_1_1_samples_generator_a52c1060c5ab1219386569f2cc39991b9.html#a52c1060c5ab1219386569f2cc39991b9">  430</a></span>&#160;<span class="keywordtype">int</span> <a class="code" href="classfabgl_1_1_samples_generator_a52c1060c5ab1219386569f2cc39991b9.html#a52c1060c5ab1219386569f2cc39991b9">SamplesGenerator::getSample</a>() {</div><div class="line"><a name="l00431"></a><span class="lineno">  431</span>&#160;</div><div class="line"><a name="l00432"></a><span class="lineno">  432</span>&#160;  <span class="keywordflow">if</span> (<a class="code" href="classfabgl_1_1_waveform_generator_a996f2f6c960641738fc46d3f39f6ef6f.html#a996f2f6c960641738fc46d3f39f6ef6f">duration</a>() == 0) {</div><div class="line"><a name="l00433"></a><span class="lineno">  433</span>&#160;    <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00434"></a><span class="lineno">  434</span>&#160;  }</div><div class="line"><a name="l00435"></a><span class="lineno">  435</span>&#160;</div><div class="line"><a name="l00436"></a><span class="lineno">  436</span>&#160;  <span class="keywordtype">int</span> sample = m_data[m_index++];</div><div class="line"><a name="l00437"></a><span class="lineno">  437</span>&#160;</div><div class="line"><a name="l00438"></a><span class="lineno">  438</span>&#160;  <span class="keywordflow">if</span> (m_index == m_length)</div><div class="line"><a name="l00439"></a><span class="lineno">  439</span>&#160;    m_index = 0;</div><div class="line"><a name="l00440"></a><span class="lineno">  440</span>&#160;</div><div class="line"><a name="l00441"></a><span class="lineno">  441</span>&#160;  <span class="comment">// process volume</span></div><div class="line"><a name="l00442"></a><span class="lineno">  442</span>&#160;  sample = sample * <a class="code" href="classfabgl_1_1_waveform_generator_a56fd55a21e8060769938c33ac16ee4f2.html#a56fd55a21e8060769938c33ac16ee4f2">volume</a>() / 127;</div><div class="line"><a name="l00443"></a><span class="lineno">  443</span>&#160;</div><div class="line"><a name="l00444"></a><span class="lineno">  444</span>&#160;  decDuration();</div><div class="line"><a name="l00445"></a><span class="lineno">  445</span>&#160;</div><div class="line"><a name="l00446"></a><span class="lineno">  446</span>&#160;  <span class="keywordflow">return</span> sample;</div><div class="line"><a name="l00447"></a><span class="lineno">  447</span>&#160;}</div><div class="line"><a name="l00448"></a><span class="lineno">  448</span>&#160;</div><div class="line"><a name="l00449"></a><span class="lineno">  449</span>&#160;</div><div class="line"><a name="l00450"></a><span class="lineno">  450</span>&#160;<span class="comment">// NoiseWaveformGenerator</span></div><div class="line"><a name="l00452"></a><span class="lineno">  452</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00453"></a><span class="lineno">  453</span>&#160;</div><div class="line"><a name="l00454"></a><span class="lineno">  454</span>&#160;</div><div class="line"><a name="l00455"></a><span class="lineno">  455</span>&#160;</div><div class="line"><a name="l00456"></a><span class="lineno">  456</span>&#160;</div><div class="line"><a name="l00458"></a><span class="lineno">  458</span>&#160;<span class="comment">// SoundGenerator</span></div><div class="line"><a name="l00459"></a><span class="lineno">  459</span>&#160;</div><div class="line"><a name="l00460"></a><span class="lineno">  460</span>&#160;</div><div class="line"><a name="l00461"></a><span class="lineno"><a class="line" href="classfabgl_1_1_sound_generator_a9137f26490315305b1fc3bc796a8e924.html#a9137f26490315305b1fc3bc796a8e924">  461</a></span>&#160;<a class="code" href="classfabgl_1_1_sound_generator_a9137f26490315305b1fc3bc796a8e924.html#a9137f26490315305b1fc3bc796a8e924">SoundGenerator::SoundGenerator</a>(<span class="keywordtype">int</span> sampleRate)</div><div class="line"><a name="l00462"></a><span class="lineno">  462</span>&#160;  : m_waveGenTaskHandle(nullptr),</div><div class="line"><a name="l00463"></a><span class="lineno">  463</span>&#160;    m_channels(nullptr),</div><div class="line"><a name="l00464"></a><span class="lineno">  464</span>&#160;    m_sampleBuffer(nullptr),</div><div class="line"><a name="l00465"></a><span class="lineno">  465</span>&#160;    m_volume(100),</div><div class="line"><a name="l00466"></a><span class="lineno">  466</span>&#160;    m_sampleRate(sampleRate),</div><div class="line"><a name="l00467"></a><span class="lineno">  467</span>&#160;    m_play(false),</div><div class="line"><a name="l00468"></a><span class="lineno">  468</span>&#160;    m_state(SoundGeneratorState::Stop)</div><div class="line"><a name="l00469"></a><span class="lineno">  469</span>&#160;{</div><div class="line"><a name="l00470"></a><span class="lineno">  470</span>&#160;  m_mutex = xSemaphoreCreateMutex();</div><div class="line"><a name="l00471"></a><span class="lineno">  471</span>&#160;  i2s_audio_init();</div><div class="line"><a name="l00472"></a><span class="lineno">  472</span>&#160;}</div><div class="line"><a name="l00473"></a><span class="lineno">  473</span>&#160;</div><div class="line"><a name="l00474"></a><span class="lineno">  474</span>&#160;</div><div class="line"><a name="l00475"></a><span class="lineno">  475</span>&#160;SoundGenerator::~SoundGenerator()</div><div class="line"><a name="l00476"></a><span class="lineno">  476</span>&#160;{</div><div class="line"><a name="l00477"></a><span class="lineno">  477</span>&#160;  <a class="code" href="classfabgl_1_1_sound_generator_ac8bb3912a3ce86b15842e79d0b421204.html#ac8bb3912a3ce86b15842e79d0b421204">clear</a>();</div><div class="line"><a name="l00478"></a><span class="lineno">  478</span>&#160;  vTaskDelete(m_waveGenTaskHandle);</div><div class="line"><a name="l00479"></a><span class="lineno">  479</span>&#160;  heap_caps_free(m_sampleBuffer);</div><div class="line"><a name="l00480"></a><span class="lineno">  480</span>&#160;  vSemaphoreDelete(m_mutex);</div><div class="line"><a name="l00481"></a><span class="lineno">  481</span>&#160;}</div><div class="line"><a name="l00482"></a><span class="lineno">  482</span>&#160;</div><div class="line"><a name="l00483"></a><span class="lineno">  483</span>&#160;</div><div class="line"><a name="l00484"></a><span class="lineno"><a class="line" href="classfabgl_1_1_sound_generator_ac8bb3912a3ce86b15842e79d0b421204.html#ac8bb3912a3ce86b15842e79d0b421204">  484</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classfabgl_1_1_sound_generator_ac8bb3912a3ce86b15842e79d0b421204.html#ac8bb3912a3ce86b15842e79d0b421204">SoundGenerator::clear</a>()</div><div class="line"><a name="l00485"></a><span class="lineno">  485</span>&#160;{</div><div class="line"><a name="l00486"></a><span class="lineno">  486</span>&#160;  AutoSemaphore autoSemaphore(m_mutex);</div><div class="line"><a name="l00487"></a><span class="lineno">  487</span>&#160;  <a class="code" href="classfabgl_1_1_sound_generator_aa7c56b84cb4738b6826e34ca20993d62.html#aa7c56b84cb4738b6826e34ca20993d62">play</a>(<span class="keyword">false</span>);</div><div class="line"><a name="l00488"></a><span class="lineno">  488</span>&#160;  m_channels = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00489"></a><span class="lineno">  489</span>&#160;}</div><div class="line"><a name="l00490"></a><span class="lineno">  490</span>&#160;</div><div class="line"><a name="l00491"></a><span class="lineno">  491</span>&#160;</div><div class="line"><a name="l00492"></a><span class="lineno">  492</span>&#160;<span class="keywordtype">void</span> SoundGenerator::i2s_audio_init()</div><div class="line"><a name="l00493"></a><span class="lineno">  493</span>&#160;{</div><div class="line"><a name="l00494"></a><span class="lineno">  494</span>&#160;  i2s_config_t i2s_config;</div><div class="line"><a name="l00495"></a><span class="lineno">  495</span>&#160;  i2s_config.mode                 = (i2s_mode_t) (I2S_MODE_MASTER | I2S_MODE_TX | I2S_MODE_DAC_BUILT_IN);</div><div class="line"><a name="l00496"></a><span class="lineno">  496</span>&#160;  i2s_config.sample_rate          = m_sampleRate;</div><div class="line"><a name="l00497"></a><span class="lineno">  497</span>&#160;  i2s_config.bits_per_sample      = I2S_BITS_PER_SAMPLE_16BIT;</div><div class="line"><a name="l00498"></a><span class="lineno">  498</span>&#160;<span class="preprocessor">  #if FABGL_ESP_IDF_VERSION &lt;= FABGL_ESP_IDF_VERSION_VAL(4, 1, 1)</span></div><div class="line"><a name="l00499"></a><span class="lineno">  499</span>&#160;    i2s_config.communication_format = (i2s_comm_format_t) I2S_COMM_FORMAT_I2S_MSB;</div><div class="line"><a name="l00500"></a><span class="lineno">  500</span>&#160;<span class="preprocessor">  #else</span></div><div class="line"><a name="l00501"></a><span class="lineno">  501</span>&#160;    i2s_config.communication_format = I2S_COMM_FORMAT_STAND_I2S;</div><div class="line"><a name="l00502"></a><span class="lineno">  502</span>&#160;<span class="preprocessor">  #endif</span></div><div class="line"><a name="l00503"></a><span class="lineno">  503</span>&#160;  i2s_config.channel_format       = I2S_CHANNEL_FMT_ONLY_RIGHT;</div><div class="line"><a name="l00504"></a><span class="lineno">  504</span>&#160;  i2s_config.intr_alloc_flags     = 0;</div><div class="line"><a name="l00505"></a><span class="lineno">  505</span>&#160;  i2s_config.dma_buf_count        = 2;</div><div class="line"><a name="l00506"></a><span class="lineno">  506</span>&#160;  i2s_config.dma_buf_len          = FABGL_SAMPLE_BUFFER_SIZE * <span class="keyword">sizeof</span>(uint16_t);</div><div class="line"><a name="l00507"></a><span class="lineno">  507</span>&#160;  i2s_config.use_apll             = 0;</div><div class="line"><a name="l00508"></a><span class="lineno">  508</span>&#160;  i2s_config.tx_desc_auto_clear   = 0;</div><div class="line"><a name="l00509"></a><span class="lineno">  509</span>&#160;  i2s_config.fixed_mclk           = 0;</div><div class="line"><a name="l00510"></a><span class="lineno">  510</span>&#160;  <span class="comment">// install and start i2s driver</span></div><div class="line"><a name="l00511"></a><span class="lineno">  511</span>&#160;  i2s_driver_install(I2S_NUM_0, &amp;i2s_config, 0, NULL);</div><div class="line"><a name="l00512"></a><span class="lineno">  512</span>&#160;  <span class="comment">// init DAC pad</span></div><div class="line"><a name="l00513"></a><span class="lineno">  513</span>&#160;  i2s_set_dac_mode(I2S_DAC_CHANNEL_RIGHT_EN); <span class="comment">// GPIO25</span></div><div class="line"><a name="l00514"></a><span class="lineno">  514</span>&#160;</div><div class="line"><a name="l00515"></a><span class="lineno">  515</span>&#160;  m_sampleBuffer = (uint16_t*) heap_caps_malloc(FABGL_SAMPLE_BUFFER_SIZE * <span class="keyword">sizeof</span>(uint16_t), MALLOC_CAP_8BIT | MALLOC_CAP_INTERNAL);</div><div class="line"><a name="l00516"></a><span class="lineno">  516</span>&#160;}</div><div class="line"><a name="l00517"></a><span class="lineno">  517</span>&#160;</div><div class="line"><a name="l00518"></a><span class="lineno">  518</span>&#160;</div><div class="line"><a name="l00519"></a><span class="lineno">  519</span>&#160;<span class="comment">// the same of forcePlay(), but fill also output DMA with 127s, making output mute (and making &quot;bumping&quot; effect)</span></div><div class="line"><a name="l00520"></a><span class="lineno"><a class="line" href="classfabgl_1_1_sound_generator_aa7c56b84cb4738b6826e34ca20993d62.html#aa7c56b84cb4738b6826e34ca20993d62">  520</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="classfabgl_1_1_sound_generator_aa7c56b84cb4738b6826e34ca20993d62.html#aa7c56b84cb4738b6826e34ca20993d62">SoundGenerator::play</a>(<span class="keywordtype">bool</span> value)</div><div class="line"><a name="l00521"></a><span class="lineno">  521</span>&#160;{</div><div class="line"><a name="l00522"></a><span class="lineno">  522</span>&#160;  AutoSemaphore autoSemaphore(m_mutex);</div><div class="line"><a name="l00523"></a><span class="lineno">  523</span>&#160;  m_play = value;</div><div class="line"><a name="l00524"></a><span class="lineno">  524</span>&#160;  <span class="keywordflow">if</span> (actualPlaying() != value) {</div><div class="line"><a name="l00525"></a><span class="lineno">  525</span>&#160;    <span class="keywordtype">bool</span> r = forcePlay(value);</div><div class="line"><a name="l00526"></a><span class="lineno">  526</span>&#160;    <span class="keywordflow">if</span> (!value)</div><div class="line"><a name="l00527"></a><span class="lineno">  527</span>&#160;      mutizeOutput();</div><div class="line"><a name="l00528"></a><span class="lineno">  528</span>&#160;    <span class="keywordflow">return</span> r;</div><div class="line"><a name="l00529"></a><span class="lineno">  529</span>&#160;  } <span class="keywordflow">else</span></div><div class="line"><a name="l00530"></a><span class="lineno">  530</span>&#160;    <span class="keywordflow">return</span> value;</div><div class="line"><a name="l00531"></a><span class="lineno">  531</span>&#160;}</div><div class="line"><a name="l00532"></a><span class="lineno">  532</span>&#160;</div><div class="line"><a name="l00533"></a><span class="lineno">  533</span>&#160;</div><div class="line"><a name="l00534"></a><span class="lineno"><a class="line" href="classfabgl_1_1_sound_generator_a7ba0033bdfb41d5d58fc63a160f311f6.html#a7ba0033bdfb41d5d58fc63a160f311f6">  534</a></span>&#160;<a class="code" href="classfabgl_1_1_samples_generator.html">SamplesGenerator</a> * <a class="code" href="classfabgl_1_1_sound_generator_a7ba0033bdfb41d5d58fc63a160f311f6.html#a7ba0033bdfb41d5d58fc63a160f311f6">SoundGenerator::playSamples</a>(int8_t <span class="keyword">const</span> * <a class="code" href="displaycontroller_8h_a96db82e580e46e24e2b39dd6c5bf7c21.html#a96db82e580e46e24e2b39dd6c5bf7c21">data</a>, <span class="keywordtype">int</span> length, <span class="keywordtype">int</span> volume, <span class="keywordtype">int</span> durationMS)</div><div class="line"><a name="l00535"></a><span class="lineno">  535</span>&#160;{</div><div class="line"><a name="l00536"></a><span class="lineno">  536</span>&#160;  <span class="keyword">auto</span> sgen = <span class="keyword">new</span> <a class="code" href="classfabgl_1_1_samples_generator.html">SamplesGenerator</a>(<a class="code" href="displaycontroller_8h_a96db82e580e46e24e2b39dd6c5bf7c21.html#a96db82e580e46e24e2b39dd6c5bf7c21">data</a>, length);</div><div class="line"><a name="l00537"></a><span class="lineno">  537</span>&#160;  <a class="code" href="classfabgl_1_1_sound_generator_a04178c4d1679101843945ecfe8c8d3e1.html#a04178c4d1679101843945ecfe8c8d3e1">attach</a>(sgen);</div><div class="line"><a name="l00538"></a><span class="lineno">  538</span>&#160;  sgen-&gt;setAutoDestroy(<span class="keyword">true</span>);</div><div class="line"><a name="l00539"></a><span class="lineno">  539</span>&#160;  <span class="keywordflow">if</span> (durationMS &gt; -1)</div><div class="line"><a name="l00540"></a><span class="lineno">  540</span>&#160;    sgen-&gt;setDuration(durationMS &gt; 0 ? (m_sampleRate / 1000 * durationMS) : length );</div><div class="line"><a name="l00541"></a><span class="lineno">  541</span>&#160;  sgen-&gt;setVolume(<a class="code" href="classfabgl_1_1_sound_generator_a56fd55a21e8060769938c33ac16ee4f2.html#a56fd55a21e8060769938c33ac16ee4f2">volume</a>);</div><div class="line"><a name="l00542"></a><span class="lineno">  542</span>&#160;  sgen-&gt;enable(<span class="keyword">true</span>);</div><div class="line"><a name="l00543"></a><span class="lineno">  543</span>&#160;  <a class="code" href="classfabgl_1_1_sound_generator_aa7c56b84cb4738b6826e34ca20993d62.html#aa7c56b84cb4738b6826e34ca20993d62">play</a>(<span class="keyword">true</span>);</div><div class="line"><a name="l00544"></a><span class="lineno">  544</span>&#160;  <span class="keywordflow">return</span> sgen;</div><div class="line"><a name="l00545"></a><span class="lineno">  545</span>&#160;}</div><div class="line"><a name="l00546"></a><span class="lineno">  546</span>&#160;</div><div class="line"><a name="l00547"></a><span class="lineno">  547</span>&#160;</div><div class="line"><a name="l00548"></a><span class="lineno">  548</span>&#160;<span class="keywordtype">bool</span> SoundGenerator::forcePlay(<span class="keywordtype">bool</span> value)</div><div class="line"><a name="l00549"></a><span class="lineno">  549</span>&#160;{</div><div class="line"><a name="l00550"></a><span class="lineno">  550</span>&#160;  <span class="keywordtype">bool</span> isPlaying = actualPlaying();</div><div class="line"><a name="l00551"></a><span class="lineno">  551</span>&#160;  <span class="keywordflow">if</span> (value) {</div><div class="line"><a name="l00552"></a><span class="lineno">  552</span>&#160;    <span class="comment">// play</span></div><div class="line"><a name="l00553"></a><span class="lineno">  553</span>&#160;    <span class="keywordflow">if</span> (!isPlaying) {</div><div class="line"><a name="l00554"></a><span class="lineno">  554</span>&#160;      <span class="keywordflow">if</span> (!m_waveGenTaskHandle)</div><div class="line"><a name="l00555"></a><span class="lineno">  555</span>&#160;        xTaskCreate(waveGenTask, <span class="stringliteral">&quot;&quot;</span>, WAVEGENTASK_STACK_SIZE, <span class="keyword">this</span>, 5, &amp;m_waveGenTaskHandle);</div><div class="line"><a name="l00556"></a><span class="lineno">  556</span>&#160;      m_state = SoundGeneratorState::RequestToPlay;</div><div class="line"><a name="l00557"></a><span class="lineno">  557</span>&#160;      xTaskNotifyGive(m_waveGenTaskHandle);</div><div class="line"><a name="l00558"></a><span class="lineno">  558</span>&#160;    }</div><div class="line"><a name="l00559"></a><span class="lineno">  559</span>&#160;  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00560"></a><span class="lineno">  560</span>&#160;    <span class="comment">// stop</span></div><div class="line"><a name="l00561"></a><span class="lineno">  561</span>&#160;    <span class="keywordflow">if</span> (isPlaying) {</div><div class="line"><a name="l00562"></a><span class="lineno">  562</span>&#160;      <span class="comment">// request task to suspend itself when possible</span></div><div class="line"><a name="l00563"></a><span class="lineno">  563</span>&#160;      m_state = SoundGeneratorState::RequestToStop;</div><div class="line"><a name="l00564"></a><span class="lineno">  564</span>&#160;      <span class="comment">// wait for task switch to suspend state (TODO: is there a better way?)</span></div><div class="line"><a name="l00565"></a><span class="lineno">  565</span>&#160;      <span class="keywordflow">while</span> (m_state != SoundGeneratorState::Stop)</div><div class="line"><a name="l00566"></a><span class="lineno">  566</span>&#160;        vTaskDelay(1);</div><div class="line"><a name="l00567"></a><span class="lineno">  567</span>&#160;    }</div><div class="line"><a name="l00568"></a><span class="lineno">  568</span>&#160;  }</div><div class="line"><a name="l00569"></a><span class="lineno">  569</span>&#160;  <span class="keywordflow">return</span> isPlaying;</div><div class="line"><a name="l00570"></a><span class="lineno">  570</span>&#160;}</div><div class="line"><a name="l00571"></a><span class="lineno">  571</span>&#160;</div><div class="line"><a name="l00572"></a><span class="lineno">  572</span>&#160;</div><div class="line"><a name="l00573"></a><span class="lineno">  573</span>&#160;<span class="keywordtype">bool</span> SoundGenerator::actualPlaying()</div><div class="line"><a name="l00574"></a><span class="lineno">  574</span>&#160;{</div><div class="line"><a name="l00575"></a><span class="lineno">  575</span>&#160;  <span class="keywordflow">return</span> m_waveGenTaskHandle &amp;&amp; m_state == SoundGeneratorState::Playing;</div><div class="line"><a name="l00576"></a><span class="lineno">  576</span>&#160;}</div><div class="line"><a name="l00577"></a><span class="lineno">  577</span>&#160;</div><div class="line"><a name="l00578"></a><span class="lineno">  578</span>&#160;</div><div class="line"><a name="l00579"></a><span class="lineno">  579</span>&#160;<span class="comment">// does NOT take ownership of the waveform generator</span></div><div class="line"><a name="l00580"></a><span class="lineno"><a class="line" href="classfabgl_1_1_sound_generator_a04178c4d1679101843945ecfe8c8d3e1.html#a04178c4d1679101843945ecfe8c8d3e1">  580</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classfabgl_1_1_sound_generator_a04178c4d1679101843945ecfe8c8d3e1.html#a04178c4d1679101843945ecfe8c8d3e1">SoundGenerator::attach</a>(<a class="code" href="classfabgl_1_1_waveform_generator.html">WaveformGenerator</a> * value)</div><div class="line"><a name="l00581"></a><span class="lineno">  581</span>&#160;{</div><div class="line"><a name="l00582"></a><span class="lineno">  582</span>&#160;  AutoSemaphore autoSemaphore(m_mutex);</div><div class="line"><a name="l00583"></a><span class="lineno">  583</span>&#160;</div><div class="line"><a name="l00584"></a><span class="lineno">  584</span>&#160;  <span class="keywordtype">bool</span> isPlaying = forcePlay(<span class="keyword">false</span>);</div><div class="line"><a name="l00585"></a><span class="lineno">  585</span>&#160;</div><div class="line"><a name="l00586"></a><span class="lineno">  586</span>&#160;  value-&gt;setSampleRate(m_sampleRate);</div><div class="line"><a name="l00587"></a><span class="lineno">  587</span>&#160;</div><div class="line"><a name="l00588"></a><span class="lineno">  588</span>&#160;  value-&gt;next = m_channels;</div><div class="line"><a name="l00589"></a><span class="lineno">  589</span>&#160;  m_channels = value;</div><div class="line"><a name="l00590"></a><span class="lineno">  590</span>&#160;</div><div class="line"><a name="l00591"></a><span class="lineno">  591</span>&#160;  forcePlay(isPlaying || m_play);</div><div class="line"><a name="l00592"></a><span class="lineno">  592</span>&#160;}</div><div class="line"><a name="l00593"></a><span class="lineno">  593</span>&#160;</div><div class="line"><a name="l00594"></a><span class="lineno">  594</span>&#160;</div><div class="line"><a name="l00595"></a><span class="lineno"><a class="line" href="classfabgl_1_1_sound_generator_a15a8d9231086fe5e0cec746e00b87144.html#a15a8d9231086fe5e0cec746e00b87144">  595</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classfabgl_1_1_sound_generator_a15a8d9231086fe5e0cec746e00b87144.html#a15a8d9231086fe5e0cec746e00b87144">SoundGenerator::detach</a>(<a class="code" href="classfabgl_1_1_waveform_generator.html">WaveformGenerator</a> * value)</div><div class="line"><a name="l00596"></a><span class="lineno">  596</span>&#160;{</div><div class="line"><a name="l00597"></a><span class="lineno">  597</span>&#160;  <span class="keywordflow">if</span> (!value)</div><div class="line"><a name="l00598"></a><span class="lineno">  598</span>&#160;    <span class="keywordflow">return</span>;</div><div class="line"><a name="l00599"></a><span class="lineno">  599</span>&#160;</div><div class="line"><a name="l00600"></a><span class="lineno">  600</span>&#160;  AutoSemaphore autoSemaphore(m_mutex);</div><div class="line"><a name="l00601"></a><span class="lineno">  601</span>&#160;</div><div class="line"><a name="l00602"></a><span class="lineno">  602</span>&#160;  <span class="keywordtype">bool</span> isPlaying = forcePlay(<span class="keyword">false</span>);</div><div class="line"><a name="l00603"></a><span class="lineno">  603</span>&#160;  detachNoSuspend(value);</div><div class="line"><a name="l00604"></a><span class="lineno">  604</span>&#160;  forcePlay(isPlaying);</div><div class="line"><a name="l00605"></a><span class="lineno">  605</span>&#160;}</div><div class="line"><a name="l00606"></a><span class="lineno">  606</span>&#160;</div><div class="line"><a name="l00607"></a><span class="lineno">  607</span>&#160;</div><div class="line"><a name="l00608"></a><span class="lineno">  608</span>&#160;<span class="keywordtype">void</span> SoundGenerator::detachNoSuspend(<a class="code" href="classfabgl_1_1_waveform_generator.html">WaveformGenerator</a> * value)</div><div class="line"><a name="l00609"></a><span class="lineno">  609</span>&#160;{</div><div class="line"><a name="l00610"></a><span class="lineno">  610</span>&#160;  <span class="keywordflow">for</span> (<a class="code" href="classfabgl_1_1_waveform_generator.html">WaveformGenerator</a> * c = m_channels, * prev = <span class="keyword">nullptr</span>; c; prev = c, c = c-&gt;next) {</div><div class="line"><a name="l00611"></a><span class="lineno">  611</span>&#160;    <span class="keywordflow">if</span> (c == value) {</div><div class="line"><a name="l00612"></a><span class="lineno">  612</span>&#160;      <span class="keywordflow">if</span> (prev)</div><div class="line"><a name="l00613"></a><span class="lineno">  613</span>&#160;        prev-&gt;next = c-&gt;next;</div><div class="line"><a name="l00614"></a><span class="lineno">  614</span>&#160;      <span class="keywordflow">else</span></div><div class="line"><a name="l00615"></a><span class="lineno">  615</span>&#160;        m_channels = c-&gt;next;</div><div class="line"><a name="l00616"></a><span class="lineno">  616</span>&#160;      <span class="keywordflow">if</span> (value-&gt;autoDestroy())</div><div class="line"><a name="l00617"></a><span class="lineno">  617</span>&#160;        <span class="keyword">delete</span> value;</div><div class="line"><a name="l00618"></a><span class="lineno">  618</span>&#160;      <span class="keywordflow">break</span>;</div><div class="line"><a name="l00619"></a><span class="lineno">  619</span>&#160;    }</div><div class="line"><a name="l00620"></a><span class="lineno">  620</span>&#160;  }</div><div class="line"><a name="l00621"></a><span class="lineno">  621</span>&#160;}</div><div class="line"><a name="l00622"></a><span class="lineno">  622</span>&#160;</div><div class="line"><a name="l00623"></a><span class="lineno">  623</span>&#160;</div><div class="line"><a name="l00624"></a><span class="lineno">  624</span>&#160;<span class="keywordtype">void</span> IRAM_ATTR SoundGenerator::waveGenTask(<span class="keywordtype">void</span> * arg)</div><div class="line"><a name="l00625"></a><span class="lineno">  625</span>&#160;{</div><div class="line"><a name="l00626"></a><span class="lineno">  626</span>&#160;  <a class="code" href="classfabgl_1_1_sound_generator_a9137f26490315305b1fc3bc796a8e924.html#a9137f26490315305b1fc3bc796a8e924">SoundGenerator</a> * soundGenerator = (<a class="code" href="classfabgl_1_1_sound_generator_a9137f26490315305b1fc3bc796a8e924.html#a9137f26490315305b1fc3bc796a8e924">SoundGenerator</a>*) arg;</div><div class="line"><a name="l00627"></a><span class="lineno">  627</span>&#160;</div><div class="line"><a name="l00628"></a><span class="lineno">  628</span>&#160;  i2s_set_clk(I2S_NUM_0, soundGenerator-&gt;m_sampleRate, I2S_BITS_PER_SAMPLE_16BIT, I2S_CHANNEL_MONO);</div><div class="line"><a name="l00629"></a><span class="lineno">  629</span>&#160;</div><div class="line"><a name="l00630"></a><span class="lineno">  630</span>&#160;  uint16_t * buf = soundGenerator-&gt;m_sampleBuffer;</div><div class="line"><a name="l00631"></a><span class="lineno">  631</span>&#160;</div><div class="line"><a name="l00632"></a><span class="lineno">  632</span>&#160;  <span class="comment">// number of mute (without channels to play) cycles</span></div><div class="line"><a name="l00633"></a><span class="lineno">  633</span>&#160;  <span class="keywordtype">int</span> muteCyclesCount = 0;</div><div class="line"><a name="l00634"></a><span class="lineno">  634</span>&#160;</div><div class="line"><a name="l00635"></a><span class="lineno">  635</span>&#160;  <span class="keywordflow">while</span> (<span class="keyword">true</span>) {</div><div class="line"><a name="l00636"></a><span class="lineno">  636</span>&#160;</div><div class="line"><a name="l00637"></a><span class="lineno">  637</span>&#160;    <span class="comment">// suspend?</span></div><div class="line"><a name="l00638"></a><span class="lineno">  638</span>&#160;    <span class="keywordflow">if</span> (soundGenerator-&gt;m_state == SoundGeneratorState::RequestToStop || soundGenerator-&gt;m_state == SoundGeneratorState::Stop) {</div><div class="line"><a name="l00639"></a><span class="lineno">  639</span>&#160;      soundGenerator-&gt;m_state = SoundGeneratorState::Stop;</div><div class="line"><a name="l00640"></a><span class="lineno">  640</span>&#160;      <span class="keywordflow">while</span> (soundGenerator-&gt;m_state == SoundGeneratorState::Stop)</div><div class="line"><a name="l00641"></a><span class="lineno">  641</span>&#160;        ulTaskNotifyTake(pdTRUE, portMAX_DELAY);  <span class="comment">// wait for &quot;give&quot;</span></div><div class="line"><a name="l00642"></a><span class="lineno">  642</span>&#160;    }</div><div class="line"><a name="l00643"></a><span class="lineno">  643</span>&#160;</div><div class="line"><a name="l00644"></a><span class="lineno">  644</span>&#160;    <span class="comment">// mutize output?</span></div><div class="line"><a name="l00645"></a><span class="lineno">  645</span>&#160;    <span class="keywordflow">if</span> (soundGenerator-&gt;m_channels == <span class="keyword">nullptr</span> &amp;&amp; muteCyclesCount &gt;= 8) {</div><div class="line"><a name="l00646"></a><span class="lineno">  646</span>&#160;      soundGenerator-&gt;m_state = SoundGeneratorState::Stop;</div><div class="line"><a name="l00647"></a><span class="lineno">  647</span>&#160;      <span class="keywordflow">while</span> (soundGenerator-&gt;m_state == SoundGeneratorState::Stop)</div><div class="line"><a name="l00648"></a><span class="lineno">  648</span>&#160;        ulTaskNotifyTake(pdTRUE, portMAX_DELAY);  <span class="comment">// wait for &quot;give&quot;</span></div><div class="line"><a name="l00649"></a><span class="lineno">  649</span>&#160;    }</div><div class="line"><a name="l00650"></a><span class="lineno">  650</span>&#160;</div><div class="line"><a name="l00651"></a><span class="lineno">  651</span>&#160;    soundGenerator-&gt;m_state = SoundGeneratorState::Playing;</div><div class="line"><a name="l00652"></a><span class="lineno">  652</span>&#160;</div><div class="line"><a name="l00653"></a><span class="lineno">  653</span>&#160;    <span class="keywordtype">int</span> mainVolume = soundGenerator-&gt;volume();</div><div class="line"><a name="l00654"></a><span class="lineno">  654</span>&#160;</div><div class="line"><a name="l00655"></a><span class="lineno">  655</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; FABGL_SAMPLE_BUFFER_SIZE; ++i) {</div><div class="line"><a name="l00656"></a><span class="lineno">  656</span>&#160;      <span class="keywordtype">int</span> sample = 0, tvol = 0;</div><div class="line"><a name="l00657"></a><span class="lineno">  657</span>&#160;      <span class="keywordflow">for</span> (<span class="keyword">auto</span> g = soundGenerator-&gt;m_channels; g; ) {</div><div class="line"><a name="l00658"></a><span class="lineno">  658</span>&#160;        <span class="keywordflow">if</span> (g-&gt;enabled()) {</div><div class="line"><a name="l00659"></a><span class="lineno">  659</span>&#160;          sample += g-&gt;getSample();</div><div class="line"><a name="l00660"></a><span class="lineno">  660</span>&#160;          tvol += g-&gt;volume();</div><div class="line"><a name="l00661"></a><span class="lineno">  661</span>&#160;        } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (g-&gt;duration() == 0 &amp;&amp; g-&gt;autoDetach()) {</div><div class="line"><a name="l00662"></a><span class="lineno">  662</span>&#160;          <span class="keyword">auto</span> curr = g;</div><div class="line"><a name="l00663"></a><span class="lineno">  663</span>&#160;          g = g-&gt;next;  <span class="comment">// setup next item before detaching this one</span></div><div class="line"><a name="l00664"></a><span class="lineno">  664</span>&#160;          soundGenerator-&gt;detachNoSuspend(curr);</div><div class="line"><a name="l00665"></a><span class="lineno">  665</span>&#160;          <span class="keywordflow">continue</span>; <span class="comment">// bypass &quot;g = g-&gt;next;&quot;</span></div><div class="line"><a name="l00666"></a><span class="lineno">  666</span>&#160;        }</div><div class="line"><a name="l00667"></a><span class="lineno">  667</span>&#160;        g = g-&gt;next;</div><div class="line"><a name="l00668"></a><span class="lineno">  668</span>&#160;      }</div><div class="line"><a name="l00669"></a><span class="lineno">  669</span>&#160;</div><div class="line"><a name="l00670"></a><span class="lineno">  670</span>&#160;      <span class="keywordtype">int</span> avol = tvol ? imin(127, 127 * 127 / tvol) : 127;</div><div class="line"><a name="l00671"></a><span class="lineno">  671</span>&#160;      sample = sample * avol / 127;</div><div class="line"><a name="l00672"></a><span class="lineno">  672</span>&#160;      sample = sample * mainVolume / 127;</div><div class="line"><a name="l00673"></a><span class="lineno">  673</span>&#160;</div><div class="line"><a name="l00674"></a><span class="lineno">  674</span>&#160;      buf[i + (i &amp; 1 ? -1 : 1)] = (127 + sample) &lt;&lt; 8;</div><div class="line"><a name="l00675"></a><span class="lineno">  675</span>&#160;    }</div><div class="line"><a name="l00676"></a><span class="lineno">  676</span>&#160;</div><div class="line"><a name="l00677"></a><span class="lineno">  677</span>&#160;    <span class="keywordtype">size_t</span> bytes_written;</div><div class="line"><a name="l00678"></a><span class="lineno">  678</span>&#160;    i2s_write(I2S_NUM_0, buf, FABGL_SAMPLE_BUFFER_SIZE * <span class="keyword">sizeof</span>(uint16_t), &amp;bytes_written, portMAX_DELAY);</div><div class="line"><a name="l00679"></a><span class="lineno">  679</span>&#160;</div><div class="line"><a name="l00680"></a><span class="lineno">  680</span>&#160;    muteCyclesCount = soundGenerator-&gt;m_channels == <span class="keyword">nullptr</span> ? muteCyclesCount + 1 : 0;</div><div class="line"><a name="l00681"></a><span class="lineno">  681</span>&#160;  }</div><div class="line"><a name="l00682"></a><span class="lineno">  682</span>&#160;}</div><div class="line"><a name="l00683"></a><span class="lineno">  683</span>&#160;</div><div class="line"><a name="l00684"></a><span class="lineno">  684</span>&#160;</div><div class="line"><a name="l00685"></a><span class="lineno">  685</span>&#160;<span class="keywordtype">void</span> SoundGenerator::mutizeOutput()</div><div class="line"><a name="l00686"></a><span class="lineno">  686</span>&#160;{</div><div class="line"><a name="l00687"></a><span class="lineno">  687</span>&#160;  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; FABGL_SAMPLE_BUFFER_SIZE; ++i)</div><div class="line"><a name="l00688"></a><span class="lineno">  688</span>&#160;    m_sampleBuffer[i] = 127 &lt;&lt; 8;</div><div class="line"><a name="l00689"></a><span class="lineno">  689</span>&#160;  <span class="keywordtype">size_t</span> bytes_written;</div><div class="line"><a name="l00690"></a><span class="lineno">  690</span>&#160;  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; 4; ++i)</div><div class="line"><a name="l00691"></a><span class="lineno">  691</span>&#160;    i2s_write(I2S_NUM_0, m_sampleBuffer, FABGL_SAMPLE_BUFFER_SIZE * <span class="keyword">sizeof</span>(uint16_t), &amp;bytes_written, portMAX_DELAY);</div><div class="line"><a name="l00692"></a><span class="lineno">  692</span>&#160;}</div><div class="line"><a name="l00693"></a><span class="lineno">  693</span>&#160;</div><div class="line"><a name="l00694"></a><span class="lineno">  694</span>&#160;</div><div class="line"><a name="l00695"></a><span class="lineno">  695</span>&#160;<span class="comment">// SoundGenerator</span></div><div class="line"><a name="l00697"></a><span class="lineno">  697</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00698"></a><span class="lineno">  698</span>&#160;</div><div class="line"><a name="l00699"></a><span class="lineno">  699</span>&#160;</div><div class="line"><a name="l00700"></a><span class="lineno">  700</span>&#160;<span class="comment">/*</span></div><div class="line"><a name="l00701"></a><span class="lineno">  701</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00702"></a><span class="lineno">  702</span>&#160;<span class="comment">// note (C,D,E,F,G,A,B) + [#,b] + octave (2..7) + space + tempo (99..1)</span></div><div class="line"><a name="l00703"></a><span class="lineno">  703</span>&#160;<span class="comment">// pause (P) + space + tempo (99.1)</span></div><div class="line"><a name="l00704"></a><span class="lineno">  704</span>&#160;<span class="comment">char const * noteToFreq(char const * note, int * freq)</span></div><div class="line"><a name="l00705"></a><span class="lineno">  705</span>&#160;<span class="comment">{</span></div><div class="line"><a name="l00706"></a><span class="lineno">  706</span>&#160;<span class="comment">  uint16_t NIDX2FREQ[][12] = { {   66,   70,   74,   78,   83,   88,   93,   98,  104,  110,  117,  124 }, // 2</span></div><div class="line"><a name="l00707"></a><span class="lineno">  707</span>&#160;<span class="comment">                               {  131,  139,  147,  156,  165,  175,  185,  196,  208,  220,  233,  247 }, // 3</span></div><div class="line"><a name="l00708"></a><span class="lineno">  708</span>&#160;<span class="comment">                               {  262,  277,  294,  311,  330,  349,  370,  392,  415,  440,  466,  494 }, // 4</span></div><div class="line"><a name="l00709"></a><span class="lineno">  709</span>&#160;<span class="comment">                               {  523,  554,  587,  622,  659,  698,  740,  784,  831,  880,  932,  988 }, // 5</span></div><div class="line"><a name="l00710"></a><span class="lineno">  710</span>&#160;<span class="comment">                               { 1046, 1109, 1175, 1245, 1319, 1397, 1480, 1568, 1661, 1760, 1865, 1976 }, // 6</span></div><div class="line"><a name="l00711"></a><span class="lineno">  711</span>&#160;<span class="comment">                               { 2093, 2217, 2349, 2489, 2637, 2794, 2960, 3136, 3322, 3520, 3729, 3951 }, // 7</span></div><div class="line"><a name="l00712"></a><span class="lineno">  712</span>&#160;<span class="comment">                             };</span></div><div class="line"><a name="l00713"></a><span class="lineno">  713</span>&#160;<span class="comment">  uint8_t NNAME2NIDX[] = {9, 11, 0, 2, 4, 5, 7};  // A, B, C, D, E, F, G</span></div><div class="line"><a name="l00714"></a><span class="lineno">  714</span>&#160;<span class="comment">  *freq = 0;</span></div><div class="line"><a name="l00715"></a><span class="lineno">  715</span>&#160;<span class="comment">  while (*note &amp;&amp; *note == &#39; &#39;)</span></div><div class="line"><a name="l00716"></a><span class="lineno">  716</span>&#160;<span class="comment">    ++note;</span></div><div class="line"><a name="l00717"></a><span class="lineno">  717</span>&#160;<span class="comment">  if (*note == 0)</span></div><div class="line"><a name="l00718"></a><span class="lineno">  718</span>&#160;<span class="comment">    return note;</span></div><div class="line"><a name="l00719"></a><span class="lineno">  719</span>&#160;<span class="comment">  int noteIndex = (*note &gt;= &#39;A&#39; &amp;&amp; *note &lt;= &#39;G&#39; ? NNAME2NIDX[*note - &#39;A&#39;] : -2); // -2 = pause</span></div><div class="line"><a name="l00720"></a><span class="lineno">  720</span>&#160;<span class="comment">  ++note;</span></div><div class="line"><a name="l00721"></a><span class="lineno">  721</span>&#160;<span class="comment">  if (*note == &#39;#&#39;) {</span></div><div class="line"><a name="l00722"></a><span class="lineno">  722</span>&#160;<span class="comment">    ++noteIndex;</span></div><div class="line"><a name="l00723"></a><span class="lineno">  723</span>&#160;<span class="comment">    ++note;</span></div><div class="line"><a name="l00724"></a><span class="lineno">  724</span>&#160;<span class="comment">  } else if (*note == &#39;b&#39;) {</span></div><div class="line"><a name="l00725"></a><span class="lineno">  725</span>&#160;<span class="comment">    --noteIndex;</span></div><div class="line"><a name="l00726"></a><span class="lineno">  726</span>&#160;<span class="comment">    ++note;</span></div><div class="line"><a name="l00727"></a><span class="lineno">  727</span>&#160;<span class="comment">  }</span></div><div class="line"><a name="l00728"></a><span class="lineno">  728</span>&#160;<span class="comment">  int octave = *note - &#39;0&#39;;</span></div><div class="line"><a name="l00729"></a><span class="lineno">  729</span>&#160;<span class="comment">  ++note;</span></div><div class="line"><a name="l00730"></a><span class="lineno">  730</span>&#160;<span class="comment">  if (noteIndex == -1) {</span></div><div class="line"><a name="l00731"></a><span class="lineno">  731</span>&#160;<span class="comment">    noteIndex = 11;</span></div><div class="line"><a name="l00732"></a><span class="lineno">  732</span>&#160;<span class="comment">    --octave;</span></div><div class="line"><a name="l00733"></a><span class="lineno">  733</span>&#160;<span class="comment">  } else if (noteIndex == 12) {</span></div><div class="line"><a name="l00734"></a><span class="lineno">  734</span>&#160;<span class="comment">    noteIndex = 0;</span></div><div class="line"><a name="l00735"></a><span class="lineno">  735</span>&#160;<span class="comment">    ++octave;</span></div><div class="line"><a name="l00736"></a><span class="lineno">  736</span>&#160;<span class="comment">  }</span></div><div class="line"><a name="l00737"></a><span class="lineno">  737</span>&#160;<span class="comment">  if (noteIndex &gt;= 0 &amp;&amp; noteIndex &lt;= 11 &amp;&amp; octave &gt;= 2 &amp;&amp; octave &lt;= 7)</span></div><div class="line"><a name="l00738"></a><span class="lineno">  738</span>&#160;<span class="comment">    *freq = NIDX2FREQ[octave - 2][noteIndex];</span></div><div class="line"><a name="l00739"></a><span class="lineno">  739</span>&#160;<span class="comment">  return note;</span></div><div class="line"><a name="l00740"></a><span class="lineno">  740</span>&#160;<span class="comment">}</span></div><div class="line"><a name="l00741"></a><span class="lineno">  741</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00742"></a><span class="lineno">  742</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00743"></a><span class="lineno">  743</span>&#160;<span class="comment">char const * noteToDelay(char const * note, int * delayMS)</span></div><div class="line"><a name="l00744"></a><span class="lineno">  744</span>&#160;<span class="comment">{</span></div><div class="line"><a name="l00745"></a><span class="lineno">  745</span>&#160;<span class="comment">  *delayMS = 0;</span></div><div class="line"><a name="l00746"></a><span class="lineno">  746</span>&#160;<span class="comment">  while (*note &amp;&amp; *note == &#39; &#39;)</span></div><div class="line"><a name="l00747"></a><span class="lineno">  747</span>&#160;<span class="comment">    ++note;</span></div><div class="line"><a name="l00748"></a><span class="lineno">  748</span>&#160;<span class="comment">  if (*note == 0)</span></div><div class="line"><a name="l00749"></a><span class="lineno">  749</span>&#160;<span class="comment">    return note;</span></div><div class="line"><a name="l00750"></a><span class="lineno">  750</span>&#160;<span class="comment">  int val = atoi(note);</span></div><div class="line"><a name="l00751"></a><span class="lineno">  751</span>&#160;<span class="comment">  if (val &gt; 0)</span></div><div class="line"><a name="l00752"></a><span class="lineno">  752</span>&#160;<span class="comment">    *delayMS = 1000 / val;</span></div><div class="line"><a name="l00753"></a><span class="lineno">  753</span>&#160;<span class="comment">  return note + (val &gt; 9 ? 2 : 1);</span></div><div class="line"><a name="l00754"></a><span class="lineno">  754</span>&#160;<span class="comment">}</span></div><div class="line"><a name="l00755"></a><span class="lineno">  755</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00756"></a><span class="lineno">  756</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00757"></a><span class="lineno">  757</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00758"></a><span class="lineno">  758</span>&#160;<span class="comment">void play_task(void*arg)</span></div><div class="line"><a name="l00759"></a><span class="lineno">  759</span>&#160;<span class="comment">{</span></div><div class="line"><a name="l00760"></a><span class="lineno">  760</span>&#160;<span class="comment">  const char * music = &quot;A4 4 A4 4 A#4 4 C5 4 C5 4 A#4 4 A4 4 G4 4 F4 4 F4 4 G4 4 A4 4 A4 2 G4 16 G4 2 P 8 &quot;</span></div><div class="line"><a name="l00761"></a><span class="lineno">  761</span>&#160;<span class="comment">                       &quot;A4 4 A4 4 A#4 4 C5 4 C5 4 A#4 4 A4 4 G4 4 F4 4 F4 4 G4 4 A4 4 G4 2 F4 16 F4 2 P 8&quot;;</span></div><div class="line"><a name="l00762"></a><span class="lineno">  762</span>&#160;<span class="comment">  while (true) {</span></div><div class="line"><a name="l00763"></a><span class="lineno">  763</span>&#160;<span class="comment">    if (Play) {</span></div><div class="line"><a name="l00764"></a><span class="lineno">  764</span>&#160;<span class="comment">      const char * m = music;</span></div><div class="line"><a name="l00765"></a><span class="lineno">  765</span>&#160;<span class="comment">      while (*m &amp;&amp; Play) {</span></div><div class="line"><a name="l00766"></a><span class="lineno">  766</span>&#160;<span class="comment">        int freq, delms;</span></div><div class="line"><a name="l00767"></a><span class="lineno">  767</span>&#160;<span class="comment">        m = noteToFreq(m, &amp;freq);</span></div><div class="line"><a name="l00768"></a><span class="lineno">  768</span>&#160;<span class="comment">        m = noteToDelay(m, &amp;delms);</span></div><div class="line"><a name="l00769"></a><span class="lineno">  769</span>&#160;<span class="comment">        frequency = freq;</span></div><div class="line"><a name="l00770"></a><span class="lineno">  770</span>&#160;<span class="comment">        delay(delms);</span></div><div class="line"><a name="l00771"></a><span class="lineno">  771</span>&#160;<span class="comment">        frequency = 0;</span></div><div class="line"><a name="l00772"></a><span class="lineno">  772</span>&#160;<span class="comment">        delay(25);</span></div><div class="line"><a name="l00773"></a><span class="lineno">  773</span>&#160;<span class="comment">      }</span></div><div class="line"><a name="l00774"></a><span class="lineno">  774</span>&#160;<span class="comment">      Play = false;</span></div><div class="line"><a name="l00775"></a><span class="lineno">  775</span>&#160;<span class="comment">    } else</span></div><div class="line"><a name="l00776"></a><span class="lineno">  776</span>&#160;<span class="comment">      delay(100);</span></div><div class="line"><a name="l00777"></a><span class="lineno">  777</span>&#160;<span class="comment">  }</span></div><div class="line"><a name="l00778"></a><span class="lineno">  778</span>&#160;<span class="comment">}</span></div><div class="line"><a name="l00779"></a><span class="lineno">  779</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00780"></a><span class="lineno">  780</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00781"></a><span class="lineno">  781</span>&#160;<span class="comment">*/</span></div><div class="line"><a name="l00782"></a><span class="lineno">  782</span>&#160;</div><div class="line"><a name="l00783"></a><span class="lineno">  783</span>&#160;</div><div class="line"><a name="l00784"></a><span class="lineno">  784</span>&#160;</div><div class="line"><a name="l00785"></a><span class="lineno">  785</span>&#160;</div><div class="line"><a name="l00786"></a><span class="lineno">  786</span>&#160;</div><div class="line"><a name="l00787"></a><span class="lineno">  787</span>&#160;</div><div class="line"><a name="l00788"></a><span class="lineno">  788</span>&#160;</div><div class="line"><a name="l00789"></a><span class="lineno">  789</span>&#160;</div><div class="line"><a name="l00790"></a><span class="lineno">  790</span>&#160;} <span class="comment">// end of namespace</span></div><div class="line"><a name="l00791"></a><span class="lineno">  791</span>&#160;</div><div class="ttc" id="classfabgl_1_1_square_waveform_generator_a52c1060c5ab1219386569f2cc39991b9_html_a52c1060c5ab1219386569f2cc39991b9"><div class="ttname"><a href="classfabgl_1_1_square_waveform_generator_a52c1060c5ab1219386569f2cc39991b9.html#a52c1060c5ab1219386569f2cc39991b9">fabgl::SquareWaveformGenerator::getSample</a></div><div class="ttdeci">int getSample()</div><div class="ttdoc">Gets next sample. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8cpp_source.html#l00164">soundgen.cpp:164</a></div></div>
<div class="ttc" id="classfabgl_1_1_sound_generator_a7ba0033bdfb41d5d58fc63a160f311f6_html_a7ba0033bdfb41d5d58fc63a160f311f6"><div class="ttname"><a href="classfabgl_1_1_sound_generator_a7ba0033bdfb41d5d58fc63a160f311f6.html#a7ba0033bdfb41d5d58fc63a160f311f6">fabgl::SoundGenerator::playSamples</a></div><div class="ttdeci">SamplesGenerator * playSamples(int8_t const *data, int length, int volume=100, int durationMS=0)</div><div class="ttdoc">Plays the specified samples. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8cpp_source.html#l00534">soundgen.cpp:534</a></div></div>
<div class="ttc" id="classfabgl_1_1_noise_waveform_generator_a5b5c30c147988a4bef2b08394984079d_html_a5b5c30c147988a4bef2b08394984079d"><div class="ttname"><a href="classfabgl_1_1_noise_waveform_generator_a5b5c30c147988a4bef2b08394984079d.html#a5b5c30c147988a4bef2b08394984079d">fabgl::NoiseWaveformGenerator::setFrequency</a></div><div class="ttdeci">void setFrequency(int value)</div><div class="ttdoc">Sets output frequency. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8cpp_source.html#l00308">soundgen.cpp:308</a></div></div>
<div class="ttc" id="classfabgl_1_1_samples_generator_html"><div class="ttname"><a href="classfabgl_1_1_samples_generator.html">fabgl::SamplesGenerator</a></div><div class="ttdoc">Samples generator. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8h_source.html#l00302">soundgen.h:302</a></div></div>
<div class="ttc" id="classfabgl_1_1_sawtooth_waveform_generator_a5b5c30c147988a4bef2b08394984079d_html_a5b5c30c147988a4bef2b08394984079d"><div class="ttname"><a href="classfabgl_1_1_sawtooth_waveform_generator_a5b5c30c147988a4bef2b08394984079d.html#a5b5c30c147988a4bef2b08394984079d">fabgl::SawtoothWaveformGenerator::setFrequency</a></div><div class="ttdeci">void setFrequency(int value)</div><div class="ttdoc">Sets output frequency. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8cpp_source.html#l00259">soundgen.cpp:259</a></div></div>
<div class="ttc" id="classfabgl_1_1_triangle_waveform_generator_a52c1060c5ab1219386569f2cc39991b9_html_a52c1060c5ab1219386569f2cc39991b9"><div class="ttname"><a href="classfabgl_1_1_triangle_waveform_generator_a52c1060c5ab1219386569f2cc39991b9.html#a52c1060c5ab1219386569f2cc39991b9">fabgl::TriangleWaveformGenerator::getSample</a></div><div class="ttdeci">int getSample()</div><div class="ttdoc">Gets next sample. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8cpp_source.html#l00215">soundgen.cpp:215</a></div></div>
<div class="ttc" id="classfabgl_1_1_waveform_generator_html"><div class="ttname"><a href="classfabgl_1_1_waveform_generator.html">fabgl::WaveformGenerator</a></div><div class="ttdoc">Base abstract class for waveform generators. A waveform generator can be seen as an audio channel tha...</div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8h_source.html#l00062">soundgen.h:62</a></div></div>
<div class="ttc" id="classfabgl_1_1_samples_generator_a52c1060c5ab1219386569f2cc39991b9_html_a52c1060c5ab1219386569f2cc39991b9"><div class="ttname"><a href="classfabgl_1_1_samples_generator_a52c1060c5ab1219386569f2cc39991b9.html#a52c1060c5ab1219386569f2cc39991b9">fabgl::SamplesGenerator::getSample</a></div><div class="ttdeci">int getSample()</div><div class="ttdoc">Gets next sample. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8cpp_source.html#l00430">soundgen.cpp:430</a></div></div>
<div class="ttc" id="classfabgl_1_1_samples_generator_a5b5c30c147988a4bef2b08394984079d_html_a5b5c30c147988a4bef2b08394984079d"><div class="ttname"><a href="classfabgl_1_1_samples_generator_a5b5c30c147988a4bef2b08394984079d.html#a5b5c30c147988a4bef2b08394984079d">fabgl::SamplesGenerator::setFrequency</a></div><div class="ttdeci">void setFrequency(int value)</div><div class="ttdoc">Sets output frequency. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8cpp_source.html#l00425">soundgen.cpp:425</a></div></div>
<div class="ttc" id="displaycontroller_8h_a96db82e580e46e24e2b39dd6c5bf7c21_html_a96db82e580e46e24e2b39dd6c5bf7c21"><div class="ttname"><a href="displaycontroller_8h_a96db82e580e46e24e2b39dd6c5bf7c21.html#a96db82e580e46e24e2b39dd6c5bf7c21">data</a></div><div class="ttdeci">uint8_t const  * data</div><div class="ttdef"><b>Definition:</b> <a href="displaycontroller_8h_source.html#l00324">displaycontroller.h:324</a></div></div>
<div class="ttc" id="classfabgl_1_1_waveform_generator_a996f2f6c960641738fc46d3f39f6ef6f_html_a996f2f6c960641738fc46d3f39f6ef6f"><div class="ttname"><a href="classfabgl_1_1_waveform_generator_a996f2f6c960641738fc46d3f39f6ef6f.html#a996f2f6c960641738fc46d3f39f6ef6f">fabgl::WaveformGenerator::duration</a></div><div class="ttdeci">uint32_t duration()</div><div class="ttdoc">Returns number of remaining samples to play. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8h_source.html#l00087">soundgen.h:87</a></div></div>
<div class="ttc" id="classfabgl_1_1_triangle_waveform_generator_a5b5c30c147988a4bef2b08394984079d_html_a5b5c30c147988a4bef2b08394984079d"><div class="ttname"><a href="classfabgl_1_1_triangle_waveform_generator_a5b5c30c147988a4bef2b08394984079d.html#a5b5c30c147988a4bef2b08394984079d">fabgl::TriangleWaveformGenerator::setFrequency</a></div><div class="ttdeci">void setFrequency(int value)</div><div class="ttdoc">Sets output frequency. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8cpp_source.html#l00207">soundgen.cpp:207</a></div></div>
<div class="ttc" id="classfabgl_1_1_sound_generator_a04178c4d1679101843945ecfe8c8d3e1_html_a04178c4d1679101843945ecfe8c8d3e1"><div class="ttname"><a href="classfabgl_1_1_sound_generator_a04178c4d1679101843945ecfe8c8d3e1.html#a04178c4d1679101843945ecfe8c8d3e1">fabgl::SoundGenerator::attach</a></div><div class="ttdeci">void attach(WaveformGenerator *value)</div><div class="ttdoc">Attaches a waveform generator. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8cpp_source.html#l00580">soundgen.cpp:580</a></div></div>
<div class="ttc" id="classfabgl_1_1_v_i_c_noise_generator_a52c1060c5ab1219386569f2cc39991b9_html_a52c1060c5ab1219386569f2cc39991b9"><div class="ttname"><a href="classfabgl_1_1_v_i_c_noise_generator_a52c1060c5ab1219386569f2cc39991b9.html#a52c1060c5ab1219386569f2cc39991b9">fabgl::VICNoiseGenerator::getSample</a></div><div class="ttdeci">int getSample()</div><div class="ttdoc">Gets next sample. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8cpp_source.html#l00363">soundgen.cpp:363</a></div></div>
<div class="ttc" id="classfabgl_1_1_sound_generator_a56fd55a21e8060769938c33ac16ee4f2_html_a56fd55a21e8060769938c33ac16ee4f2"><div class="ttname"><a href="classfabgl_1_1_sound_generator_a56fd55a21e8060769938c33ac16ee4f2.html#a56fd55a21e8060769938c33ac16ee4f2">fabgl::SoundGenerator::volume</a></div><div class="ttdeci">int volume()</div><div class="ttdoc">Determines current overall volume. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8h_source.html#l00463">soundgen.h:463</a></div></div>
<div class="ttc" id="namespacefabgl_html"><div class="ttname"><a href="namespacefabgl.html">fabgl</a></div><div class="ttdef"><b>Definition:</b> <a href="canvas_8cpp_source.html#l00036">canvas.cpp:36</a></div></div>
<div class="ttc" id="classfabgl_1_1_sound_generator_ac8bb3912a3ce86b15842e79d0b421204_html_ac8bb3912a3ce86b15842e79d0b421204"><div class="ttname"><a href="classfabgl_1_1_sound_generator_ac8bb3912a3ce86b15842e79d0b421204.html#ac8bb3912a3ce86b15842e79d0b421204">fabgl::SoundGenerator::clear</a></div><div class="ttdeci">void clear()</div><div class="ttdoc">Stops playing and removes all attached waveform generators. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8cpp_source.html#l00484">soundgen.cpp:484</a></div></div>
<div class="ttc" id="classfabgl_1_1_sound_generator_a15a8d9231086fe5e0cec746e00b87144_html_a15a8d9231086fe5e0cec746e00b87144"><div class="ttname"><a href="classfabgl_1_1_sound_generator_a15a8d9231086fe5e0cec746e00b87144.html#a15a8d9231086fe5e0cec746e00b87144">fabgl::SoundGenerator::detach</a></div><div class="ttdeci">void detach(WaveformGenerator *value)</div><div class="ttdoc">Detaches a waveform generator. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8cpp_source.html#l00595">soundgen.cpp:595</a></div></div>
<div class="ttc" id="classfabgl_1_1_sound_generator_aa7c56b84cb4738b6826e34ca20993d62_html_aa7c56b84cb4738b6826e34ca20993d62"><div class="ttname"><a href="classfabgl_1_1_sound_generator_aa7c56b84cb4738b6826e34ca20993d62.html#aa7c56b84cb4738b6826e34ca20993d62">fabgl::SoundGenerator::play</a></div><div class="ttdeci">bool play(bool value)</div><div class="ttdoc">Starts or stops playing. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8cpp_source.html#l00520">soundgen.cpp:520</a></div></div>
<div class="ttc" id="classfabgl_1_1_sawtooth_waveform_generator_a52c1060c5ab1219386569f2cc39991b9_html_a52c1060c5ab1219386569f2cc39991b9"><div class="ttname"><a href="classfabgl_1_1_sawtooth_waveform_generator_a52c1060c5ab1219386569f2cc39991b9.html#a52c1060c5ab1219386569f2cc39991b9">fabgl::SawtoothWaveformGenerator::getSample</a></div><div class="ttdeci">int getSample()</div><div class="ttdoc">Gets next sample. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8cpp_source.html#l00267">soundgen.cpp:267</a></div></div>
<div class="ttc" id="classfabgl_1_1_v_i_c_noise_generator_a5b5c30c147988a4bef2b08394984079d_html_a5b5c30c147988a4bef2b08394984079d"><div class="ttname"><a href="classfabgl_1_1_v_i_c_noise_generator_a5b5c30c147988a4bef2b08394984079d.html#a5b5c30c147988a4bef2b08394984079d">fabgl::VICNoiseGenerator::setFrequency</a></div><div class="ttdeci">void setFrequency(int value)</div><div class="ttdoc">Sets output frequency. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8cpp_source.html#l00352">soundgen.cpp:352</a></div></div>
<div class="ttc" id="classfabgl_1_1_sine_waveform_generator_a52c1060c5ab1219386569f2cc39991b9_html_a52c1060c5ab1219386569f2cc39991b9"><div class="ttname"><a href="classfabgl_1_1_sine_waveform_generator_a52c1060c5ab1219386569f2cc39991b9.html#a52c1060c5ab1219386569f2cc39991b9">fabgl::SineWaveformGenerator::getSample</a></div><div class="ttdeci">int getSample()</div><div class="ttdoc">Gets next sample. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8cpp_source.html#l00101">soundgen.cpp:101</a></div></div>
<div class="ttc" id="soundgen_8h_html"><div class="ttname"><a href="soundgen_8h.html">soundgen.h</a></div><div class="ttdoc">This file contains all classes related to FabGL Sound System. </div></div>
<div class="ttc" id="classfabgl_1_1_sine_waveform_generator_a5b5c30c147988a4bef2b08394984079d_html_a5b5c30c147988a4bef2b08394984079d"><div class="ttname"><a href="classfabgl_1_1_sine_waveform_generator_a5b5c30c147988a4bef2b08394984079d.html#a5b5c30c147988a4bef2b08394984079d">fabgl::SineWaveformGenerator::setFrequency</a></div><div class="ttdeci">void setFrequency(int value)</div><div class="ttdoc">Sets output frequency. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8cpp_source.html#l00093">soundgen.cpp:93</a></div></div>
<div class="ttc" id="classfabgl_1_1_square_waveform_generator_a5b5c30c147988a4bef2b08394984079d_html_a5b5c30c147988a4bef2b08394984079d"><div class="ttname"><a href="classfabgl_1_1_square_waveform_generator_a5b5c30c147988a4bef2b08394984079d.html#a5b5c30c147988a4bef2b08394984079d">fabgl::SquareWaveformGenerator::setFrequency</a></div><div class="ttdeci">void setFrequency(int value)</div><div class="ttdoc">Sets output frequency. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8cpp_source.html#l00149">soundgen.cpp:149</a></div></div>
<div class="ttc" id="classfabgl_1_1_square_waveform_generator_a5719e6bf55f3f485e6b82e7800acf004_html_a5719e6bf55f3f485e6b82e7800acf004"><div class="ttname"><a href="classfabgl_1_1_square_waveform_generator_a5719e6bf55f3f485e6b82e7800acf004.html#a5719e6bf55f3f485e6b82e7800acf004">fabgl::SquareWaveformGenerator::setDutyCycle</a></div><div class="ttdeci">void setDutyCycle(int dutyCycle)</div><div class="ttdoc">Sets square wave duty cycle. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8cpp_source.html#l00158">soundgen.cpp:158</a></div></div>
<div class="ttc" id="classfabgl_1_1_waveform_generator_abc395029362d9990b5dad44dfafe9d63_html_abc395029362d9990b5dad44dfafe9d63"><div class="ttname"><a href="classfabgl_1_1_waveform_generator_abc395029362d9990b5dad44dfafe9d63.html#abc395029362d9990b5dad44dfafe9d63">fabgl::WaveformGenerator::sampleRate</a></div><div class="ttdeci">uint16_t sampleRate()</div><div class="ttdoc">Determines the sample rate. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8h_source.html#l00158">soundgen.h:158</a></div></div>
<div class="ttc" id="classfabgl_1_1_noise_waveform_generator_a52c1060c5ab1219386569f2cc39991b9_html_a52c1060c5ab1219386569f2cc39991b9"><div class="ttname"><a href="classfabgl_1_1_noise_waveform_generator_a52c1060c5ab1219386569f2cc39991b9.html#a52c1060c5ab1219386569f2cc39991b9">fabgl::NoiseWaveformGenerator::getSample</a></div><div class="ttdeci">int getSample()</div><div class="ttdoc">Gets next sample. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8cpp_source.html#l00313">soundgen.cpp:313</a></div></div>
<div class="ttc" id="classfabgl_1_1_waveform_generator_a56fd55a21e8060769938c33ac16ee4f2_html_a56fd55a21e8060769938c33ac16ee4f2"><div class="ttname"><a href="classfabgl_1_1_waveform_generator_a56fd55a21e8060769938c33ac16ee4f2.html#a56fd55a21e8060769938c33ac16ee4f2">fabgl::WaveformGenerator::volume</a></div><div class="ttdeci">int volume()</div><div class="ttdoc">Determines current volume. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8h_source.html#l00126">soundgen.h:126</a></div></div>
<div class="ttc" id="classfabgl_1_1_sound_generator_a9137f26490315305b1fc3bc796a8e924_html_a9137f26490315305b1fc3bc796a8e924"><div class="ttname"><a href="classfabgl_1_1_sound_generator_a9137f26490315305b1fc3bc796a8e924.html#a9137f26490315305b1fc3bc796a8e924">fabgl::SoundGenerator::SoundGenerator</a></div><div class="ttdeci">SoundGenerator(int sampleRate=16000)</div><div class="ttdoc">Creates an instance of the sound generator. Only one instance is allowed. </div><div class="ttdef"><b>Definition:</b> <a href="soundgen_8cpp_source.html#l00461">soundgen.cpp:461</a></div></div>
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